{"product_id":"ferrix-03-gfo","title":"FERRIX-03 High-Capacity GFO | Phosphate, Silicate \u0026 Heavy Metal Remover","description":"\u003c!-- ================================================================\nFERRIX-03 — High-Capacity Granular Ferric Hydroxide (GFO)\nBiotech Aquatica — Shopify PRODUCT page Custom Liquid block\nLIQUID PRISM v6 — FILTRATION PALETTE (MAIN1 cold blue \/ MAIN2 silver \/ gold accent)\n----------------------------------------------------------------\nNOTE: Replace template--19556885725426__main with this store's actual\nproduct template section ID if it differs.\nSuggested URL handle: ferrix-03-gfo\n================================================================ --\u003e\n\n\u003c!-- SEO \u0026 METADATA --\u003e\n\u003ctitle\u003eFERRIX-03 High-Capacity GFO | Filter Media | BTAqua\u003c\/title\u003e\n\u003cmeta name=\"description\" content=\"FERRIX-03 high-capacity granular ferric hydroxide (GFO) strips phosphate, silicate \u0026amp; heavy metals from aquarium \u0026amp; aquaculture water. DIN EN 15029. BTA.\"\u003e\n\u003cmeta name=\"keywords\" content=\"FERRIX-03, GFO, granular ferric hydroxide, phosphate remover aquarium, phosphate reactor media, silicate remover, reef phosphate control, aquaculture water treatment, heavy metal remover, filter media, ferric oxide hydroxide, BTAqua, Biotech Aquatica\"\u003e\n\u003clink rel=\"canonical\" href=\"{{%20canonical_url%20}}\"\u003e\n\u003cmeta property=\"og:type\" content=\"product\"\u003e\n\u003cmeta property=\"og:title\" content=\"FERRIX-03 High-Capacity GFO | Filter Media\"\u003e\n\u003cmeta property=\"og:description\" content=\"Industrial-grade GFO: phosphate, silicate \u0026amp; heavy metal removal. ~300 m²\/g, 60% iron, DIN EN 15029.\"\u003e\n\u003cmeta property=\"og:image\" content=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO2.png?v=1784783380\"\u003e\n\u003cmeta property=\"og:url\" content=\"{{ canonical_url }}\"\u003e\n\u003cmeta property=\"og:site_name\" content=\"Biotech Aquatica\"\u003e\n\u003cmeta property=\"product:brand\" content=\"Biotech Aquatica\"\u003e\n\u003cmeta property=\"product:availability\" content=\"instock\"\u003e\n\u003cmeta property=\"product:condition\" content=\"new\"\u003e\n\u003cmeta name=\"twitter:card\" content=\"summary_large_image\"\u003e\n\u003cmeta name=\"twitter:title\" content=\"FERRIX-03 High-Capacity GFO | Filter Media\"\u003e\n\u003cmeta name=\"twitter:description\" content=\"Three contaminant classes. One media. Phosphate · Silicate · Metals — stripped by high-capacity granular ferric hydroxide.\"\u003e\n\u003cmeta name=\"twitter:image\" content=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO2.png?v=1784783380\"\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"FERRIX-03 High-Capacity Granular Ferric Hydroxide (GFO)\",\n  \"alternateName\": \"FERRIX-03 GFO Phosphate Remover\",\n  \"image\": \"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO2.png?v=1784783380\",\n  \"brand\": { \"@type\": \"Brand\", \"name\": \"Biotech Aquatica\" },\n  \"material\": \"Granular ferric hydroxide (ß-FeOOH \/ Fe(OH)3)\",\n  \"category\": \"Aquarium \u0026 Aquaculture Filter Media\",\n  \"audience\": { \"@type\": \"Audience\", \"audienceType\": \"Aquarium keepers, aquaculture facilities, pond owners\" },\n  \"description\": \"High-capacity granular ferric hydroxide adsorbent for aquarium and aquaculture water treatment. Primary phosphate (PO4) removal; also adsorbs silicate (SiO4), heavy metals (arsenic, copper, lead, zinc, molybdenum, antimony, vanadium, uranium), hydrogen sulfide (H2S) and hydrogen peroxide (H2O2). ~300 m2\/g BET surface area, 60% iron content, 0.2–2.0 mm low-dust granules. Manufactured to DIN EN 15029 in an ISO 9001:2015 certified facility.\",\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"AUD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": { \"@type\": \"Organization\", \"name\": \"Biotech Aquatica\", \"url\": \"https:\/\/www.btaqua.com.au\" }\n  }\n}\n\u003c\/script\u003e\n\n\u003cstyle\u003e\n@font-face{\n  font-family:\"MBF-Humanica\";\n  src:url(\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/MBF-Humanica.woff\") format(\"woff\");\n  font-display:swap;\n}\n\n:root{\n  --void:#010508;\n  --abyss:#020a10;\n  \/* MAIN1 — Cold Blue (filtration) *\/\n  --main1-deep:#0c1f33;\n  --main1-mid:#112a45;\n  --main1-bright:#0478b8;\n  --main1-pale:#56ccf9;\n  --main1-glow:rgba(4,120,184,.15);\n  --main1-highlight:#a8e7ff;\n  \/* MAIN2 — Silver *\/\n  --main2-deep:#8a9bae;\n  --main2-mid:#c0c8d4;\n  --main2-bright:#d8e0ea;\n  --main2-pale:#f0f4f8;\n  --main2-glow:rgba(192,200,212,.15);\n  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content:\"\";\n  position:absolute;left:0;top:0;bottom:0;width:3px;\n  background:linear-gradient(180deg,var(--main2-bright),var(--main1-bright),var(--main1-pale));\n}\n.bta-strip strong{color:var(--main1-pale);font-weight:700;}\n.bta-strip em{color:var(--main2-pale);font-style:normal;font-weight:600;}\n\n\/* ── SECTIONS ── *\/\n.bta-section{position:relative;padding:120px 0;overflow:visible;}\n.bta-section--angle{clip-path:polygon(0 8%,100% 0,100% 100%,0 100%);padding-top:140px;margin-top:-4rem;}\n.bta-section-dark{\n  background:var(--abyss);position:relative;overflow:hidden;padding:120px 0;\n}\n.bta-section-dark::before{\n  content:\"\";\n  position:absolute;inset:0;\n  background:\n    radial-gradient(ellipse at 30% 40%,rgba(4,120,184,.05),transparent 55%),\n    radial-gradient(ellipse at 75% 60%,rgba(192,200,212,.03),transparent 50%);\n  pointer-events:none;\n}\n.bta-section-label{\n  font-family:var(--font);font-size:.68rem;letter-spacing:.5em;color:var(--main2-bright);\n  text-transform:uppercase;margin-bottom:.7rem;\n  display:flex;align-items:center;gap:.8rem;\n}\n.bta-section-label::after{content:\"\";flex:1;height:1px;background:linear-gradient(90deg,var(--main2-bright),transparent);opacity:.4;}\n.bta-section-title{\n  font-family:var(--font);font-size:clamp(2.4rem,5.5vw,4rem);color:var(--chrome);\n  text-transform:uppercase;margin:0 0 1.5rem;line-height:.95;letter-spacing:-.01em;\n  text-align:left;position:relative;\n}\n.bta-section-intro{color:var(--text-dim);font-size:1.06rem;margin-bottom:2rem;line-height:1.7;max-width:800px;}\n.bta-divider{height:1px;background:linear-gradient(90deg,transparent,rgba(4,120,184,.12),transparent);margin:2.5rem 0;}\n\n\/* ── SPOTLIGHT ── *\/\n.bta-spotlight{\n  position:relative;margin:2.5rem 0 3rem;border-radius:20px;overflow:hidden;\n  background:linear-gradient(150deg,rgba(4,120,184,.12),rgba(2,10,16,.96));\n}\n.bta-spotlight::before{\n  content:\"\";\n  position:absolute;inset:0;border-radius:20px;padding:2px;\n  background:linear-gradient(135deg,var(--main1-bright),var(--main2-bright),var(--purple-bright),var(--main1-pale));\n  background-size:300% 300%;\n  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);\n  -webkit-mask-composite:xor;\n  mask-composite:exclude;\n  pointer-events:none;z-index:2;\n  animation:holographic-shift 6s linear infinite;\n}\n.bta-spotlight::after{\n  content:\"\";\n  position:absolute;inset:0;\n  background:\n    radial-gradient(ellipse 600px 300px at 30% 20%,rgba(4,120,184,.14),transparent 60%),\n    radial-gradient(ellipse 400px 300px at 80% 90%,rgba(192,200,212,.10),transparent 55%);\n  pointer-events:none;z-index:1;\n}\n.bta-spotlight-inner{position:relative;z-index:3;padding:3rem 3rem 2.6rem;}\n.bta-spotlight-flag{\n  display:inline-block;\n  font-family:var(--font);font-size:.72rem;letter-spacing:.4em;text-transform:uppercase;\n  color:var(--void);background:linear-gradient(135deg,var(--main1-bright),var(--main1-pale));\n  padding:.4rem 1.2rem;border-radius:4px;margin-bottom:1.2rem;font-weight:800;\n  box-shadow:0 0 20px rgba(4,120,184,.35);\n}\n.bta-spotlight h3{\n  font-family:var(--font);font-size:clamp(2.6rem,6vw,5rem);line-height:.95;text-transform:uppercase;margin:0 0 1.3rem;\n  background:linear-gradient(135deg,var(--main1-glow),var(--main1-pale),var(--main2-pale));\n  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;\n  text-shadow:0 0 60px rgba(4,120,184,.3);\n  letter-spacing:-.01em;\n}\n.bta-spotlight-lead{color:var(--chrome);font-size:clamp(1.15rem,2vw,1.5rem);line-height:1.65;margin:0 0 1.2rem;max-width:960px;font-weight:500;}\n.bta-spotlight-lead strong{color:var(--main1-pale);}\n.bta-spotlight-sub{color:var(--text-dim);font-size:1.02rem;line-height:1.8;margin:0 0 2rem;max-width:960px;}\n.bta-spotlight-sub strong{color:var(--main2-pale);}\n.bta-spotlight-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;}\n.bta-spotlight-metric{\n  background:rgba(255,255,255,.03);border:1px solid rgba(4,120,184,.18);border-radius:12px;\n  padding:1.4rem 1.2rem;text-align:center;transition:all .4s;\n}\n.bta-spotlight-metric:hover{\n  border-color:rgba(4,120,184,.45);\n  box-shadow:0 0 24px rgba(4,120,184,.12);\n  transform:translateY(-4px);\n}\n.bta-spotlight-metric .m-num{display:block;font-family:var(--font);font-size:1.5rem;color:var(--main1-bright);text-shadow:0 0 14px rgba(4,120,184,.35);margin-bottom:.4rem;line-height:1.1;}\n.bta-spotlight-metric .m-label{display:block;font-size:.74rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:.1em;line-height:1.4;}\n\n\/* ── DIFF GRID ── *\/\n.bta-diff-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:22px;margin-top:2rem;}\n.bta-diff-card{\n  position:relative;\n  background:linear-gradient(165deg,rgba(4,120,184,.03),rgba(255,255,255,.01));\n  border:1px solid rgba(4,120,184,.08);border-radius:16px;padding:2.2rem;\n  transition:all .5s cubic-bezier(.23,1,.32,1);\n  transform-style:preserve-3d;perspective:1000px;\n  overflow:hidden;cursor:default;\n}\n.bta-diff-card::before{\n  content:\"\";\n  position:absolute;inset:0;border-radius:16px;\n  background:radial-gradient(600px circle at var(--mx,50%) var(--my,50%),rgba(4,120,184,.08),transparent 40%);\n  opacity:0;transition:opacity .4s;pointer-events:none;z-index:1;\n}\n.bta-diff-card:hover::before{opacity:1;}\n.bta-diff-card:hover{\n  transform:translateY(-8px);\n  box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 40px rgba(4,120,184,.08),0 0 15px rgba(192,200,212,.05);\n  border-color:rgba(4,120,184,.2);\n}\n.bta-diff-card::after{\n  content:\"\";\n  position:absolute;left:0;right:0;bottom:0;height:2px;\n  background:linear-gradient(90deg,var(--main2-bright),var(--main1-bright),var(--main1-pale));\n  opacity:.5;\n}\n.bta-diff-card .bta-icon{\n  font-size:2.6rem;display:block;margin-bottom:1rem;position:relative;z-index:2;\n  color:var(--chrome);text-shadow:0 0 18px rgba(4,120,184,.5);\n}\n.bta-diff-card h3{font-family:var(--font);font-size:1.2rem;color:var(--main1-bright)!important;margin-bottom:.6rem;letter-spacing:.02em;position:relative;z-index:2;text-transform:uppercase;}\n.bta-diff-card p{margin:0;color:var(--text-dim);line-height:1.75;font-size:.95rem;position:relative;z-index:2;}\n.bta-diff-card p strong{color:var(--chrome);}\n\n\/* ── FEATURES GRID ── *\/\n.bta-feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin-top:2rem;}\n.bta-feat-card{\n  background:var(--glass);border:1px solid var(--glass-border);border-radius:12px;padding:1.8rem;\n  transition:all .4s;\n}\n.bta-feat-card:hover{\n  transform:translateY(-4px);\n  border-color:rgba(4,120,184,.25);\n  box-shadow:0 0 24px rgba(4,120,184,.08);\n}\n.bta-feat-card h4{font-family:var(--font);color:var(--main1-pale)!important;font-size:1.1rem;text-transform:uppercase;margin-bottom:.5rem;letter-spacing:.02em;}\n.bta-feat-card p{color:var(--text-dim);font-size:.95rem;line-height:1.7;margin:0;}\n.bta-feat-card p strong{color:var(--chrome);}\n\n\/* ── STRAIN CHIPS (contaminant list) ── *\/\n.bta-strain-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:1.5rem;}\n.bta-strain-chip{\n  font-family:var(--font-mono);font-size:.82rem;color:var(--main2-pale);\n  background:rgba(192,200,212,.05);border:1px solid rgba(192,200,212,.2);border-radius:40px;\n  padding:.5rem 1.1rem;transition:all .3s;\n}\n.bta-strain-chip:hover{\n  background:rgba(192,200,212,.12);border-color:rgba(192,200,212,.45);\n  color:var(--main2-highlight);transform:translateY(-2px);\n}\n\n\/* ── MEDIA ROW (granule close-up + quality bullets) ── *\/\n.bta-media-row{display:grid;grid-template-columns:minmax(0,460px) 1fr;gap:3rem;align-items:center;margin-top:3.5rem;}\n.bta-media-figure{\n  position:relative;aspect-ratio:1\/1;min-height:280px;margin:0;\n  border-radius:16px;overflow:hidden;\n  border:1px solid rgba(192,200,212,.18);\n  box-shadow:0 20px 50px rgba(0,0,0,.5),0 0 30px rgba(4,120,184,.08);\n}\n.bta-media-figure img{display:block;width:100%;height:100%;object-fit:cover;}\n.bta-media-figure figcaption{\n  position:absolute;left:0;right:0;bottom:0;\n  padding:.9rem 1.2rem;\n  background:linear-gradient(180deg,transparent,rgba(1,5,8,.88));\n  font-size:.74rem;color:var(--text-dim);letter-spacing:.14em;text-transform:uppercase;\n}\n.bta-media-points{display:flex;flex-direction:column;gap:1.1rem;}\n.bta-media-point{display:flex;gap:.9rem;align-items:flex-start;color:var(--text-dim);font-size:1rem;line-height:1.7;}\n.bta-media-point strong{color:var(--chrome);}\n.bta-media-point .bta-tick{color:var(--main1-bright);font-weight:900;font-size:1.15em;line-height:1.4;text-shadow:0 0 8px rgba(4,120,184,.4);flex-shrink:0;}\n\n\/* ── QUICK USE GUIDE ── *\/\n.bta-quick-section{background:transparent;padding:120px 0;}\n.bta-quick-guide{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:2.5rem;}\n.bta-guide-step{\n  position:relative;background:transparent;border:1px solid rgba(255,255,255,.12);border-radius:16px;\n  padding:2.2rem;transition:all .4s;\n}\n.bta-guide-step:hover{transform:translateY(-6px);border-color:rgba(4,120,184,.3);}\n.bta-guide-num{font-family:var(--font);font-size:3.6rem;color:var(--purple-bright);line-height:1;text-shadow:0 0 20px rgba(147,51,234,.4);}\n.bta-guide-step-icon{\n  width:64px;height:64px;border-radius:14px;display:flex;align-items:center;justify-content:center;\n  font-size:1.8rem;margin:1rem 0;color:#fff;\n}\n.bta-guide-step-icon--main1{background:linear-gradient(135deg,var(--main1-deep),var(--main1-mid),var(--main1-bright));box-shadow:var(--glow-main1);text-shadow:0 0 10px rgba(0,0,0,.4);}\n.bta-guide-step-icon--main2{background:linear-gradient(135deg,var(--main2-deep),var(--main2-mid),var(--main2-bright));box-shadow:var(--glow-main2);text-shadow:0 0 10px rgba(0,0,0,.4);}\n.bta-guide-step-icon--purple{background:linear-gradient(135deg,var(--purple-deep),var(--purple-mid),var(--purple-bright));box-shadow:var(--glow-purple);text-shadow:0 0 10px rgba(0,0,0,.4);}\n.bta-guide-step-icon--copper{background:linear-gradient(135deg,var(--copper-deep),var(--copper),var(--copper-bright));box-shadow:var(--glow-copper);text-shadow:0 0 10px rgba(0,0,0,.4);}\n.bta-guide-step h4{font-family:var(--font);font-size:1.3rem;color:#fff;text-transform:uppercase;margin-bottom:.5rem;}\n.bta-guide-step p{color:#d0d8e0;font-size:.98rem;line-height:1.8;margin:0;}\n.bta-key{font-family:var(--font-mono);background:rgba(255,255,255,.08);border-radius:4px;padding:.1rem .45rem;color:var(--main1-pale);}\n\n\/* ── SPEC TABLE ── *\/\n.bta-table-wrap{position:relative;margin:1.5rem 0;border-radius:16px;overflow:hidden;}\n.bta-table-wrap::before{\n  content:\"\";\n  position:absolute;inset:0;border-radius:16px;padding:1px;\n  background:linear-gradient(135deg,rgba(4,120,184,.4),rgba(192,200,212,.25),rgba(147,51,234,.35),rgba(0,229,255,.15),rgba(4,120,184,.4));\n  background-size:300% 300%;\n  -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);\n  -webkit-mask-composite:xor;\n  mask-composite:exclude;\n  pointer-events:none;z-index:3;\n  animation:holographic-shift 6s linear infinite;\n}\n@keyframes holographic-shift{0%{background-position:0% 50%;}50%{background-position:100% 50%;}100%{background-position:0% 50%;}}\n.bta-table{\n  width:100%;border-collapse:collapse;\n  background:linear-gradient(180deg,rgba(4,120,184,.20),rgba(2,10,16,.97));\n  min-width:600px;position:relative;z-index:2;font-size:.92rem;\n}\n.bta-table thead{background:linear-gradient(90deg,rgba(12,31,51,.8),rgba(2,10,16,.7),rgba(12,31,51,.8));position:relative;}\n.bta-table thead::after{\n  content:\"\";\n  position:absolute;bottom:0;left:0;right:0;height:2px;\n  background:linear-gradient(90deg,var(--main2-bright),var(--main1-bright),var(--main1-pale));\n}\n.bta-table th{font-family:var(--font);font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;padding:1.3rem 1.1rem;text-align:left;color:var(--main1-pale);text-shadow:0 0 12px rgba(4,120,184,.2);border-bottom:none;}\n.bta-table td{padding:1.1rem;color:var(--text);border-bottom:1px solid rgba(4,120,184,.06);transition:all .25s;}\n.bta-table .bta-model{font-family:var(--font);color:var(--main1-bright);font-weight:700;letter-spacing:.03em;}\n.bta-table .bta-highlight{color:var(--cyan-energy);font-family:var(--font-mono);}\n.bta-table .bta-muted{color:var(--text-dim);font-size:.88em;}\n.bta-table tbody tr{transition:all .25s;}\n.bta-table tbody tr:hover{background:rgba(4,120,184,.06);}\n.bta-table tbody tr:hover td{color:#fff;}\n.bta-table-note{font-size:.82em;color:var(--text-dim);line-height:1.6;margin-top:.75rem;text-align:right;}\n\n\/* ── FAQ ── *\/\n.bta-faq-item{border-bottom:1px solid rgba(4,120,184,.08);padding:1.25rem 0;transition:all .3s;}\n.bta-faq-item:hover{background:rgba(4,120,184,.02);padding-left:.5rem;}\n.bta-faq-item:last-child{border-bottom:none;}\n.bta-faq-q{font-size:.98em;font-weight:700;color:var(--chrome);margin-bottom:.5rem;display:flex;gap:10px;align-items:flex-start;}\n.bta-faq-q .bta-qm{color:var(--main1-bright);font-family:var(--font);font-weight:900;font-size:1.1em;flex-shrink:0;}\n.bta-faq-a{color:var(--text-dim);font-size:.94em;line-height:1.8;padding-left:1.375rem;}\n.bta-faq-a strong{color:var(--main1-pale);}\n\n\/* ── CTA \/ WHOLESALE ── *\/\n.bta-cta-dark{position:relative;text-align:center;padding:140px 20px 130px;overflow:hidden;background:var(--void);}\n.bta-cta-dark::before{\n  content:\"\";\n  position:absolute;inset:0;\n  background:\n    radial-gradient(ellipse 800px 400px at 50% 50%,rgba(4,120,184,.06),transparent 60%),\n    radial-gradient(ellipse 600px 300px at 50% 50%,rgba(192,200,212,.03),transparent 50%);\n}\n.bta-cta-vortex{\n  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);\n  width:600px;height:600px;border-radius:50%;border:1px solid rgba(4,120,184,.05);\n  animation:vortex-spin 30s linear infinite;\n}\n.bta-cta-vortex:nth-child(2){width:450px;height:450px;border-color:rgba(192,200,212,.05);animation-direction:reverse;animation-duration:25s;}\n@keyframes vortex-spin{to{transform:translate(-50%,-50%) rotate(360deg);}}\n.bta-cta-dark .bta-wrap{position:relative;z-index:2;}\n.bta-cta-dark .bta-section-title{margin-bottom:1.5rem;text-align:center;}\n.bta-cta-dark p{color:var(--text-dim);max-width:650px;margin:0 auto;font-size:1.08rem;line-height:1.85;}\n.bta-btn{\n  display:inline-block;font-family:var(--font);font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;\n  padding:1rem 2.5rem;background:linear-gradient(135deg,var(--main1-bright),var(--main1-pale));\n  color:var(--void);border-radius:4px;transition:all .3s;position:relative;overflow:hidden;font-weight:700;\n}\n.bta-btn:hover{box-shadow:0 0 40px rgba(4,120,184,.4);transform:translateY(-2px);}\n.bta-btn::after{\n  content:\"\";position:absolute;top:0;left:-100%;width:100%;height:100%;\n  background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s;\n}\n.bta-btn:hover::after{left:100%;}\n.bta-ghost-btn{\n  display:inline-block;font-family:var(--font);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;\n  color:var(--chrome);border:1px solid rgba(4,120,184,.3);padding:.85rem 2rem;border-radius:4px;transition:all .3s;\n}\n.bta-ghost-btn:hover{\n  background:rgba(4,120,184,.05);border-color:var(--main1-bright);color:var(--main1-bright);\n  box-shadow:0 0 20px rgba(4,120,184,.15);\n}\n.bta-cta-btns{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-top:2rem;}\n.bta-foot-note{margin-top:3rem;font-size:.8rem;color:var(--text-dim);opacity:.75;line-height:1.8;}\n\n\/* ── RESPONSIVE ── *\/\n@media(max-width:768px){\n  .bta-wrap{padding:0 1.5rem;}\n  .bta-page-hero .bta-wrap{flex-direction:column;text-align:center;min-height:auto;padding:4rem 1.5rem;}\n  .bta-hero-left{flex:1;text-align:center;}\n  .bta-hero-right{display:none;}\n  .bta-h2,.bta-section-title{text-align:center;font-size:clamp(2rem,7vw,3rem);}\n  .bta-page-hero-sub{text-align:center;margin:0 auto;}\n  .bta-kicker{margin-left:auto;margin-right:auto;display:table;}\n  .bta-stat-row{justify-content:center;}\n  .bta-diff-grid,.bta-feat-grid,.bta-quick-guide{grid-template-columns:1fr;}\n  .bta-media-row{grid-template-columns:1fr;}\n  .bta-table{min-width:600px;}\n  .bta-strip{clip-path:none;padding:2.5rem 2rem;margin-bottom:0;}\n  .bta-section--angle{clip-path:none;padding-top:80px;margin-top:0;}\n  .bta-trust-row{flex-direction:column;}\n  .bta-spotlight-inner{padding:2rem 1.5rem;}\n  .bta-spotlight-metrics{grid-template-columns:1fr 1fr;}\n}\n\n\/* ── LIST RESET SAFETY BLOCK ── *\/\n.bta-pg ul,.bta-pg ol,.bta-pg li,.bta-pg ul li,.bta-pg ol li,\n.bta-diff-card ul,.bta-diff-card ol,.bta-diff-card li,\n.bta-feat-card ul,.bta-feat-card ol,.bta-feat-card li{\n  list-style:none!important;\n  list-style-type:none!important;\n  list-style-image:none!important;\n  counter-reset:none!important;\n  counter-increment:none!important;\n  padding-left:0!important;\n  margin-left:0!important;\n}\n.bta-diff-card h3,.bta-feat-card h4{color:#fff!important;}\n\u003c\/style\u003e\n\n\u003cdiv class=\"bta-pg\"\u003e\n\n  \u003c!-- ============ 1. HERO ============ --\u003e\n  \u003csection class=\"bta-page-hero\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-hero-left\"\u003e\n        \u003cspan class=\"bta-kicker\"\u003eHigh-Capacity GFO · Granular Ferric Hydroxide\u003c\/span\u003e\n        \u003ch1 class=\"bta-h2\"\u003eFERRIX\u003csup class=\"main1\"\u003e03\u003c\/sup\u003e\n\u003c\/h1\u003e\n        \u003cp class=\"bta-page-hero-sub\"\u003e\n          \u003cstrong\u003eThree contaminant classes. One media. Zero compromise.\u003c\/strong\u003e\u003cbr\u003e\n          FERRIX-03 is an industrial-grade granular ferric hydroxide adsorbent — engineered for municipal\n          wastewater treatment, unleashed on your \u003cem\u003ereef tank, RAS or pond\u003c\/em\u003e.\n        \u003c\/p\u003e\n        \u003cdiv class=\"bta-stat-row\"\u003e\n          \u003cspan class=\"bta-stat-capsule\"\u003e\u003cspan class=\"bta-stat-num\"\u003e~300\u003c\/span\u003e\u003cspan class=\"bta-stat-label\"\u003em²\/g Reactive Surface\u003c\/span\u003e\u003c\/span\u003e\n          \u003cspan class=\"bta-stat-capsule\"\u003e\u003cspan class=\"bta-stat-num\"\u003e60%\u003c\/span\u003e\u003cspan class=\"bta-stat-label\"\u003eIron Content\u003c\/span\u003e\u003c\/span\u003e\n          \u003cspan class=\"bta-stat-capsule\"\u003e\u003cspan class=\"bta-stat-num\"\u003e0.2–2.0\u003c\/span\u003e\u003cspan class=\"bta-stat-label\"\u003emm Low-Dust Granules\u003c\/span\u003e\u003c\/span\u003e\n          \u003cspan class=\"bta-stat-capsule\"\u003e\u003cspan class=\"bta-stat-num\"\u003e12\u003c\/span\u003e\u003cspan class=\"bta-stat-label\"\u003eCertified Targets\u003c\/span\u003e\u003c\/span\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-hero-right\"\u003e\n        \u003cdiv class=\"bta-prism-ring\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"bta-prism-ring\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"bta-prism-ring\"\u003e\u003c\/div\u003e\n        \u003cdiv class=\"bta-hero-img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO2.png?v=1784783380\" width=\"800\" height=\"800\" fetchpriority=\"high\" decoding=\"async\" alt=\"FERRIX-03 granular ferric hydroxide (GFO) close-up — 0.2 to 2.0 mm low-dust porous granules\" onerror=\"this.onerror=null;this.src='https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO2.png';\"\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 2. ANNOUNCEMENT ============ --\u003e\n  \u003csection class=\"bta-announce\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-announce-row\"\u003e\n        \u003cspan class=\"bta-badge bta-badge-new\"\u003eNEW\u003c\/span\u003e\n        \u003cspan\u003eWastewater-grade adsorption power for aquariums \u0026amp; aquaculture\u003c\/span\u003e\n        \u003cspan class=\"bta-badge bta-badge-feat\"\u003eDIN EN 15029\u003c\/span\u003e\n        \u003cspan\u003ePhosphate · Silicate · Metals\u003c\/span\u003e\n        \u003cspan class=\"bta-badge bta-badge-cold\"\u003e60% Iron\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 3. TRUST + INTRO STRIP ============ --\u003e\n  \u003cdiv class=\"bta-wrap\" style=\"padding-top:4rem;\"\u003e\n    \u003cdiv class=\"bta-trust-row\"\u003e\n      \u003cspan class=\"bta-trust-badge\"\u003e\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e Phosphate · Silicate · Metals\u003c\/span\u003e\n      \u003cspan class=\"bta-trust-badge\"\u003e\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e ~300 m²\/g BET Surface\u003c\/span\u003e\n      \u003cspan class=\"bta-trust-badge\"\u003e\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e Low-Dust 0.2–2.0 mm Granules\u003c\/span\u003e\n      \u003cspan class=\"bta-trust-badge\"\u003e\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e DIN EN 15029 · ISO 9001\u003c\/span\u003e\n      \u003cspan class=\"bta-trust-badge\"\u003e\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e Reef · Freshwater · RAS · Ponds\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"bta-strip\" style=\"margin-top:2rem;\"\u003e\n      \u003cstrong\u003eFERRIX-03 is not another aquarium GFO.\u003c\/strong\u003e It's a certified water-treatment adsorbent —\n      granular ferric hydroxide with \u003cstrong\u003e~300 m²\/g of reactive surface\u003c\/strong\u003e and\n      \u003cstrong\u003e60% iron content\u003c\/strong\u003e, built to strip phosphate, silicate and heavy metals from\n      municipal and industrial wastewater. We've brought that same capacity to wet systems of every size:\n      \u003cem\u003emore adsorption per gram, longer media life, and a certified target list\u003c\/em\u003e that budget\n      aquarium GFO simply doesn't have. \u003cem\u003eData is king\u003c\/em\u003e — and this data sheet speaks for itself.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ============ 4. THE DIFFERENCE (dark) ============ --\u003e\n  \u003csection class=\"bta-section-dark\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-section-label\"\u003eWhy the 03?\u003c\/div\u003e\n      \u003ch2 class=\"bta-section-title\"\u003eThree Targets. \u003cspan class=\"main1\"\u003eOne Media.\u003c\/span\u003e\n\u003c\/h2\u003e\n      \u003cp class=\"bta-section-intro\"\u003e\n        The 03 is the whole story: phosphate, silicate and heavy metals — the three contaminant classes\n        behind algae outbreaks, diatom blooms and long-term livestock stress — all locked onto one\n        high-capacity media surface.\n      \u003c\/p\u003e\n\n      \u003cdiv class=\"bta-spotlight\"\u003e\n        \u003cdiv class=\"bta-spotlight-inner\"\u003e\n          \u003cspan class=\"bta-spotlight-flag\"\u003eThe 03 Difference\u003c\/span\u003e\n          \u003ch3\u003eCertified Capacity.\u003cbr\u003eAquarium Ready.\u003c\/h3\u003e\n          \u003cp class=\"bta-spotlight-lead\"\u003e\n            Most aquarium GFO is an unbranded brown powder with a marketing story.\n            \u003cstrong\u003eFERRIX-03 is manufactured to DIN EN 15029\u003c\/strong\u003e — the European standard for\n            water-treatment adsorbents — in an ISO 9001:2015 certified facility.\n          \u003c\/p\u003e\n          \u003cp class=\"bta-spotlight-sub\"\u003e\n            That means every batch carries a guaranteed spec: \u003cstrong\u003e60% iron content, ~300 m²\/g BET\n            surface, low-dust granules\u003c\/strong\u003e. It fluidises cleanly in a reactor, runs quiet in a media\n            bag, and keeps working long after budget media is exhausted.\n          \u003c\/p\u003e\n          \u003cdiv class=\"bta-spotlight-metrics\"\u003e\n            \u003cdiv class=\"bta-spotlight-metric\"\u003e\n\u003cspan class=\"m-num\"\u003e~300 m²\/g\u003c\/span\u003e\u003cspan class=\"m-label\"\u003eBET reactive surface area\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv class=\"bta-spotlight-metric\"\u003e\n\u003cspan class=\"m-num\"\u003e60%\u003c\/span\u003e\u003cspan class=\"m-label\"\u003eIron content by weight\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv class=\"bta-spotlight-metric\"\u003e\n\u003cspan class=\"m-num\"\u003e12 targets\u003c\/span\u003e\u003cspan class=\"m-label\"\u003eOn the certified removal list\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv class=\"bta-spotlight-metric\"\u003e\n\u003cspan class=\"m-num\"\u003eLow dust\u003c\/span\u003e\u003cspan class=\"m-label\"\u003eRinses clear in seconds\u003c\/span\u003e\n\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"bta-diff-grid\"\u003e\n        \u003cdiv class=\"bta-diff-card\"\u003e\n          \u003cspan class=\"bta-icon\"\u003e🧪\u003c\/span\u003e\n          \u003ch3\u003e01 · Phosphate\u003c\/h3\u003e\n          \u003cp\u003eThe number one algae fuel in any wet system. Phosphate feeds nuisance algae, fuels\n          cyanobacteria and suppresses coral calcification. \u003cstrong\u003eFERRIX-03 locks it onto the media\n          surface — permanently\u003c\/strong\u003e, until you change the media out.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-diff-card\"\u003e\n          \u003cspan class=\"bta-icon\"\u003e🦠\u003c\/span\u003e\n          \u003ch3\u003e02 · Silicate\u003c\/h3\u003e\n          \u003cp\u003eThe diatom fuel most budget GFO ignores. Silicate drives brown diatom films in reef and\n          freshwater systems alike — and it's \u003cstrong\u003eon the certified target list\u003c\/strong\u003e, not the\n          fine print.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-diff-card\"\u003e\n          \u003cspan class=\"bta-icon\"\u003e🧲\u003c\/span\u003e\n          \u003ch3\u003e03 · Heavy Metals\u003c\/h3\u003e\n          \u003cp\u003eTap water top-ups, salt mixes and food all drip-feed metals into your system. FERRIX-03\n          strips \u003cstrong\u003earsenic, copper, lead, zinc and more\u003c\/strong\u003e before they accumulate in fish\n          tissue and invertebrates.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 5. FEATURES (angle) ============ --\u003e\n  \u003csection class=\"bta-section bta-section--angle\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-section-label\"\u003eCertified Target List\u003c\/div\u003e\n      \u003ch2 class=\"bta-section-title\"\u003eThe Full \u003cspan class=\"main1\"\u003eRemoval\u003c\/span\u003e List\u003c\/h2\u003e\n      \u003cp class=\"bta-section-intro\"\u003e\n        Straight off the manufacturer's certified target list — every contaminant below is adsorbed by\n        FERRIX-03 as water passes over the granules.\n      \u003c\/p\u003e\n\n      \u003cdiv class=\"bta-strain-row\"\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003ePhosphate (PO₄³⁻) — primary target\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eSilicate (SiO₄) — diatom fuel\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eArsenic (As)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eCopper (Cu)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eLead (Pb)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eZinc (Zn)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eMolybdenum (Mo)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eAntimony (Sb)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eVanadium (V)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eUranium (U)\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eHydrogen Sulfide (H₂S) — rotten-egg gas\u003c\/span\u003e\n        \u003cspan class=\"bta-strain-chip\"\u003eHydrogen Peroxide (H₂O₂) — residual oxidant\u003c\/span\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"bta-media-row\"\u003e\n        \u003cfigure class=\"bta-media-figure\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO.png?v=1784783381\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\" alt=\"Macro close-up of FERRIX-03 ferric hydroxide granules showing porous angular structure\" onerror=\"this.onerror=null;this.src='https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO.png';\"\u003e\n          \u003cfigcaption\u003eFERRIX-03 granules at close range — angular, porous, reactive\u003c\/figcaption\u003e\n        \u003c\/figure\u003e\n        \u003cdiv class=\"bta-media-points\"\u003e\n          \u003cdiv class=\"bta-media-point\"\u003e\n\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLow-dust granules.\u003c\/strong\u003e A quick rinse and you're running — no orange cloud, no fines blowing through sponges.\u003c\/span\u003e\n\u003c\/div\u003e\n          \u003cdiv class=\"bta-media-point\"\u003e\n\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBuilt to fluidise.\u003c\/strong\u003e The 0.2–2.0 mm grain tumbles gently in a reactor without grinding to dust.\u003c\/span\u003e\n\u003c\/div\u003e\n          \u003cdiv class=\"bta-media-point\"\u003e\n\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMassive reactive surface.\u003c\/strong\u003e ~300 m² of adsorption sites per gram — that's why it outlasts budget media between change-outs.\u003c\/span\u003e\n\u003c\/div\u003e\n          \u003cdiv class=\"bta-media-point\"\u003e\n\u003cspan class=\"bta-tick\"\u003e✓\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNo leaching, no nonsense.\u003c\/strong\u003e Contaminants stay bound to the media until you throw it out. Nothing dosed, nothing released back.\u003c\/span\u003e\n\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"bta-divider\"\u003e\u003c\/div\u003e\n\n      \u003cdiv class=\"bta-section-label\"\u003eApplications\u003c\/div\u003e\n      \u003ch2 class=\"bta-section-title\" style=\"font-size:clamp(2rem,4vw,3rem);\"\u003eBuilt for Every \u003cspan class=\"main2\"\u003eWet System\u003c\/span\u003e\n\u003c\/h2\u003e\n\n      \u003cdiv class=\"bta-feat-grid\"\u003e\n        \u003cdiv class=\"bta-feat-card\"\u003e\n          \u003ch4\u003eReef \u0026amp; Marine\u003c\/h4\u003e\n          \u003cp\u003eHold phosphate at ultra-low levels for \u003cstrong\u003eSPS colour and growth\u003c\/strong\u003e, starve nuisance\n          algae and dinoflagellates, and strip the silicate that fuels diatoms. Run it in a fluidised\n          reactor for maximum efficiency.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-feat-card\"\u003e\n          \u003ch4\u003eFreshwater \u0026amp; Planted\u003c\/h4\u003e\n          \u003cp\u003eCrush algae outbreaks and diatom films without algaecides. \u003cstrong\u003eHigh-tech planted note:\u003c\/strong\u003e\n          if you dose phosphate as fertiliser, run FERRIX-03 sparingly or bypass it — it will strip dosed PO₄.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-feat-card\"\u003e\n          \u003ch4\u003eAquaculture \u0026amp; RAS\u003c\/h4\u003e\n          \u003cp\u003ePolish phosphate in intensive systems, \u003cstrong\u003ebind hydrogen sulfide\u003c\/strong\u003e in sumps and\n          sludge zones, and strip heavy metals from intake water. Bulk supply and LSS sizing available —\n          talk to us.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-feat-card\"\u003e\n          \u003ch4\u003ePonds\u003c\/h4\u003e\n          \u003cp\u003eCut the phosphate that feeds \u003cstrong\u003eblanket weed and green water\u003c\/strong\u003e. Run in a media bag\n          in a high-flow zone of your filter and replace when algae pressure returns.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 6. QUICK USE GUIDE ============ --\u003e\n  \u003csection class=\"bta-section bta-quick-section\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-section-label\"\u003eQuick Use Guide\u003c\/div\u003e\n      \u003ch2 class=\"bta-section-title\"\u003eHow to \u003cspan class=\"main1\"\u003eRun It\u003c\/span\u003e\n\u003c\/h2\u003e\n\n      \u003cdiv class=\"bta-quick-guide\"\u003e\n        \u003cdiv class=\"bta-guide-step\"\u003e\n          \u003cdiv class=\"bta-guide-num\"\u003e1\u003c\/div\u003e\n          \u003cdiv class=\"bta-guide-step-icon bta-guide-step-icon--main1\"\u003e💧\u003c\/div\u003e\n          \u003ch4\u003eRinse Briefly\u003c\/h4\u003e\n          \u003cp\u003eLow-dust granules — a quick rinse under RO or tap water until the runoff clears and you're done.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-guide-step\"\u003e\n          \u003cdiv class=\"bta-guide-num\"\u003e2\u003c\/div\u003e\n          \u003cdiv class=\"bta-guide-step-icon bta-guide-step-icon--main2\"\u003e🛀\u003c\/div\u003e\n          \u003ch4\u003eFluidised Reactor (Best)\u003c\/h4\u003e\n          \u003cp\u003eAim for a \u003cspan class=\"bta-key\"\u003egentle, slow tumble\u003c\/span\u003e — not a boil. Over-fluidising grinds media and clouds water.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-guide-step\"\u003e\n          \u003cdiv class=\"bta-guide-num\"\u003e3\u003c\/div\u003e\n          \u003cdiv class=\"bta-guide-step-icon bta-guide-step-icon--purple\"\u003e🧸\u003c\/div\u003e\n          \u003ch4\u003eOr Media Bag\u003c\/h4\u003e\n          \u003cp\u003eHigh-flow zone of sump or canister filter. Knead weekly to stop channelling so water can't cheat past the granules.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"bta-guide-step\"\u003e\n          \u003cdiv class=\"bta-guide-num\"\u003e4\u003c\/div\u003e\n          \u003cdiv class=\"bta-guide-step-icon bta-guide-step-icon--copper\"\u003e📊\u003c\/div\u003e\n          \u003ch4\u003eTest, Don't Guess\u003c\/h4\u003e\n          \u003cp\u003eStart at \u003cspan class=\"bta-key\"\u003e~100 mL per 400 L\u003c\/span\u003e, check PO₄ weekly and replace when levels climb. Established reefs: start at half dose and ramp over 1–2 weeks. Data is king.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 7. FAQ (dark) ============ --\u003e\n  \u003csection class=\"bta-section-dark\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003cdiv class=\"bta-section-label\"\u003eStraight Answers\u003c\/div\u003e\n      \u003ch2 class=\"bta-section-title\"\u003eFERRIX\u003csup class=\"main1\" style=\"font-size:.5em;vertical-align:super;\"\u003e03\u003c\/sup\u003e \u003cspan class=\"main2\"\u003eFAQ\u003c\/span\u003e\n\u003c\/h2\u003e\n\n      \u003cdiv class=\"bta-faq-item\"\u003e\n        \u003cdiv class=\"bta-faq-q\"\u003e\n\u003cspan class=\"bta-qm\"\u003eQ\u003c\/span\u003e Is FERRIX-03 just GFO?\u003c\/div\u003e\n        \u003cdiv class=\"bta-faq-a\"\u003eYes — GFO is granular ferric oxide\/hydroxide, and FERRIX-03 is the \u003cstrong\u003ehigh-capacity, wastewater-treatment-grade version\u003c\/strong\u003e. ~300 m²\/g reactive surface and 60% iron content means more adsorption per gram than budget aquarium GFO, and it's certified to the DIN EN 15029 water-treatment standard.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-faq-item\"\u003e\n        \u003cdiv class=\"bta-faq-q\"\u003e\n\u003cspan class=\"bta-qm\"\u003eQ\u003c\/span\u003e Does it really remove silicate?\u003c\/div\u003e\n        \u003cdiv class=\"bta-faq-a\"\u003eYes — \u003cstrong\u003esilicate is on the manufacturer's certified target list\u003c\/strong\u003e. Most budget GFO barely touches it; that's why diatoms keep coming back.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-faq-item\"\u003e\n        \u003cdiv class=\"bta-faq-q\"\u003e\n\u003cspan class=\"bta-qm\"\u003eQ\u003c\/span\u003e Is it reef safe?\u003c\/div\u003e\n        \u003cdiv class=\"bta-faq-a\"\u003eYes, used as directed. Start conservative in established reefs and ramp over 1–2 weeks — \u003cstrong\u003erapid phosphate drops stress corals\u003c\/strong\u003e more than high phosphate does.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-faq-item\"\u003e\n        \u003cdiv class=\"bta-faq-q\"\u003e\n\u003cspan class=\"bta-qm\"\u003eQ\u003c\/span\u003e How often do I replace it?\u003c\/div\u003e\n        \u003cdiv class=\"bta-faq-a\"\u003eWhen phosphate starts climbing again — typically \u003cstrong\u003e4–8 weeks in aquariums\u003c\/strong\u003e depending on bioload and feeding. Test, don't guess.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-faq-item\"\u003e\n        \u003cdiv class=\"bta-faq-q\"\u003e\n\u003cspan class=\"bta-qm\"\u003eQ\u003c\/span\u003e Freshwater and planted tanks?\u003c\/div\u003e\n        \u003cdiv class=\"bta-faq-a\"\u003eBrilliant for algae and diatom control. One exception: planted tanks dosing phosphate fertiliser — \u003cstrong\u003erun sparingly or bypass\u003c\/strong\u003e, as it will strip dosed phosphate.\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 8. NOT SURE CTA ============ --\u003e\n  \u003csection class=\"bta-section\" style=\"text-align:center;\"\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003ch2 class=\"bta-section-title\" style=\"text-align:center;\"\u003eNot Sure How Much \u003cspan class=\"main1\"\u003eYou Need?\u003c\/span\u003e\n\u003c\/h2\u003e\n      \u003cp class=\"bta-section-intro\" style=\"margin-left:auto;margin-right:auto;text-align:center;\"\u003e\n        Tell us your system volume, livestock and current phosphate reading — we'll size the media and\n        the reactor to match. Commercial and RAS systems sized off phosphorus load and hydraulics.\n      \u003c\/p\u003e\n      \u003ca href=\"mailto:info@btaqua.com.au\" class=\"bta-ghost-btn\"\u003eAsk the Team\u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ============ 9. WHOLESALE \/ TRADE CTA ============ --\u003e\n  \u003csection class=\"bta-cta-dark\"\u003e\n    \u003cdiv class=\"bta-cta-vortex\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"bta-cta-vortex\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"bta-wrap\"\u003e\n      \u003ch2 class=\"bta-section-title\"\u003eRunning a Shop, Public Aquarium\u003cbr\u003eor \u003cspan class=\"main1\"\u003eAquaculture Facility?\u003c\/span\u003e\n\u003c\/h2\u003e\n      \u003cp\u003e\n        FERRIX-03 is available from retail packs through bulk drums for RAS and life-support systems.\n        Wholesale pricing, technical sizing support and full data sheets on request.\n      \u003c\/p\u003e\n      \u003cdiv class=\"bta-cta-btns\"\u003e\n        \u003ca href=\"mailto:info@btaqua.com.au\" class=\"bta-btn\"\u003eEmail the Team\u003c\/a\u003e\n        \u003ca href=\"\/pages\/contact\" class=\"bta-ghost-btn\"\u003eTalk Wholesale\u003c\/a\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-foot-note\"\u003e\n        German-engineered media to DIN EN 15029, backed by 20+ years of Australian aquatic expertise — Biotech Aquatica, Inverell NSW.\u003cbr\u003e\n        Adsorption capacity depends on water parameters and operating conditions. Recommendations are a starting point, not a guarantee — test your water.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n\u003c\/div\u003e\u003c!-- \/.bta-pg --\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is FERRIX-03 just GFO?\",\n      \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Yes — GFO is granular ferric oxide\/hydroxide, and FERRIX-03 is a high-capacity, wastewater-treatment-grade version. With ~300 m2\/g of reactive surface area and 60% iron content, it carries far more adsorption capacity than budget aquarium GFO, and it is certified to the DIN EN 15029 water-treatment standard.\" }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does FERRIX-03 remove silicate?\",\n      \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Yes. Silicate (SiO4) is on the manufacturer's certified target list — unlike many budget GFO medias that barely touch it. Silicate is the fuel for brown diatom blooms in both reef and freshwater systems.\" }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is FERRIX-03 reef safe?\",\n      \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Yes, when used as directed. Start with a conservative dose in established reef tanks — rapid phosphate drops can stress corals. Ramp up over 1–2 weeks and test phosphate regularly.\" }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How often does FERRIX-03 need replacing?\",\n      \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Replace it when phosphate levels start climbing again — typically every 4–8 weeks in aquariums depending on bioload and feeding. Test, don't guess.\" }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use FERRIX-03 in freshwater or planted tanks?\",\n      \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Yes — it is excellent in freshwater for algae and diatom control. One exception: heavily planted tanks that dose phosphate as fertiliser should use it sparingly or bypass it, as it will strip dosed phosphate.\" }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Biotech Aquatica ","offers":[{"title":"FERRIX-03 High-Capacity GFO 500gm","offer_id":49834723082482,"sku":"FER-O3-500gm","price":39.75,"currency_code":"AUD","in_stock":true},{"title":"FERRIX-03 High-Capacity GFO 1000gm","offer_id":49834723115250,"sku":"FER-O3-1000gm","price":65.6,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/CloseUPgranuleGFO.png?v=1784783381","url":"https:\/\/www.btaqua.com.au\/products\/ferrix-03-gfo","provider":"Biotech Aquatica ","version":"1.0","type":"link"}