{"product_id":"ltxoh-pisolitic-iron-laterite","title":"LTX-OH Pisolitic Iron Laterite Substrate | Biotech Aquatica","description":"\u003cstyle\u003e\n@font-face{font-family:\"MBF-Humanica\";src:url(\"\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/MBF-Humanica.woff\") format(\"woff\");font-display:swap;font-style:normal;font-weight:400}\n\n\/* Hide the native Dawn product title above this description; keep the custom LTX H1 below. *\/\n.product__title,.product__info h1,.product__title h1{display:none!important}\n\n.bta-ltx-page{\n  --coal:#EFEDEA;\n  --dark:#E4DFD8;\n  --panel:#D8D1C6;\n  --sand:#F7F3EE;\n  --card:#FFFFFF;\n  --ink:#3A281C;\n  --text:#2E231B;\n  --muted:#5F5347;\n  --red-deep:#7F1D1D;\n  --red:#9A2A1A;\n  --ochre:#A16207;\n  --burnt:#C2410C;\n  --burnt-deep:#7C2D12;\n  --burnt-pale:#FBE8D8;\n  --copper-text:#92400e;\n  --copper:#B45309;\n  --copper-deep:#78350f;\n  --sand-accent:#E8C98A;\n  --line:rgba(58,40,28,.16);\n  --shadow:0 16px 44px 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span{background:linear-gradient(90deg,var(--burnt-deep),var(--burnt))}\n.bta-ltx-bar--alumina span{background:linear-gradient(90deg,var(--copper-deep),var(--copper))}\n.bta-ltx-compo-note{margin:.9rem 0 0;font-size:.85rem;color:var(--muted)}\n.bta-ltx-callout{background:var(--sand);border:1px solid rgba(146,64,14,.25);border-radius:14px;padding:1.15rem 1.4rem;color:var(--text)}\n.bta-ltx-callout strong{color:var(--red-deep)}\n.bta-ltx-checks{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin:1.25rem 0 1.75rem!important;padding:0!important}\n.bta-ltx-checks li{list-style:none!important;margin:0!important;padding:.9rem 1rem .9rem 2.6rem;position:relative;background:var(--card);border:1px solid var(--line);border-radius:12px;color:var(--muted);font-size:.93rem;line-height:1.55}\n.bta-ltx-checks li:before{content:\"✓\";position:absolute;left:.95rem;top:.85rem;color:var(--burnt);font-weight:900}\n.bta-ltx-checks li 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var(--sand-accent);color:#fff!important}\n.bta-ltx-button--ghost:hover{background:var(--burnt-deep);color:#fff!important}\n.bta-ltx-trade{text-align:center;background:var(--ink);color:#fff;padding:clamp(4rem,8vw,7rem) 0}\n.bta-ltx-trade p{color:#E5DED4;max-width:42rem;margin:0 auto 1.5rem}\n.bta-ltx-trade h2{color:#fff}\n.bta-ltx-trade h2 span{color:var(--sand-accent)}\n.bta-ltx-small{font-size:.84rem;color:#E5DED4}\n@media(max-width:900px){.bta-ltx-card-grid{grid-template-columns:1fr 1fr}.bta-ltx-included{grid-template-columns:1fr 1fr}.bta-ltx-option-grid{grid-template-columns:1fr 1fr}}\n@media(max-width:700px){.bta-ltx-hero-grid,.bta-ltx-compare,.bta-ltx-crosssell,.bta-ltx-upgrade,.bta-ltx-edit-grid,.bta-ltx-compo,.bta-ltx-checks{grid-template-columns:1fr}.bta-ltx-card-grid,.bta-ltx-option-grid,.bta-ltx-included{grid-template-columns:1fr}.bta-ltx-hero{padding-top:3rem}.bta-ltx-hero-media{min-height:18rem}.bta-ltx-section{padding:4rem 0}.bta-ltx-table{min-width:900px}.bta-ltx-announcement .bta-ltx-wrap{justify-content:flex-start;text-align:left}.bta-ltx-drop:first-letter{font-size:3rem}}\n@media(prefers-reduced-motion:reduce){.bta-ltx-page *,.bta-ltx-page *:before,.bta-ltx-page *:after{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.001ms!important}.bta-ltx-card:hover,.bta-ltx-button:hover{transform:none}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"bta-ltx-page\"\u003e\n  \u003csection class=\"bta-ltx-hero\" aria-labelledby=\"ltx-title\"\u003e\n    \u003cdiv class=\"bta-ltx-wrap bta-ltx-hero-grid\"\u003e\n      \u003cdiv\u003e\n        \u003cdiv class=\"bta-ltx-kicker\"\u003ePisolitic iron laterite\u003c\/div\u003e\n        \u003ch1 id=\"ltx-title\"\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e\n\u003c\/h1\u003e\n        \u003cp class=\"bta-ltx-lead\"\u003eTrue pisolitic iron laterite for planted aquaria, aquaponics grow beds and premium potting and bonsai mixes. Iron-rich by geology — not by additive.\u003c\/p\u003e\n        \u003cdiv class=\"bta-ltx-stat-row\" aria-label=\"Key product points\"\u003e\n          \u003cdiv class=\"bta-ltx-stat\"\u003e\n\u003cstrong\u003e3\u003c\/strong\u003e\u003csmall\u003egraded cuts\u003c\/small\u003e\n\u003c\/div\u003e\n          \u003cdiv class=\"bta-ltx-stat\"\u003e\n\u003cstrong\u003e250mL–10L\u003c\/strong\u003e\u003csmall\u003epack sizes\u003c\/small\u003e\n\u003c\/div\u003e\n          \u003cdiv class=\"bta-ltx-stat\"\u003e\n\u003cstrong\u003eBasalt\u003c\/strong\u003e\u003csmall\u003eiron-rich parent rock\u003c\/small\u003e\n\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"bta-ltx-hero-media\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTX_hero_picture.jpg?v=1790125875\" alt=\"LTX pisolitic iron laterite — rounded dark red-brown iron-cemented pisoliths\" width=\"460\" height=\"460\" loading=\"eager\" fetchpriority=\"high\" decoding=\"async\"\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-announcement\" aria-label=\"Product highlights\"\u003e\n    \u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cspan class=\"bta-ltx-badge bta-ltx-badge--burnt\"\u003eTrue iron laterite\u003c\/span\u003e\u003cstrong\u003ePlanted aquaria · Aquaponics · Bonsai \u0026amp; potting\u003c\/strong\u003e\u003cspan class=\"bta-ltx-badge bta-ltx-badge--ink\"\u003eSeven volume packs\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-trust\" aria-label=\"Product benefits\"\u003e\u003cdiv class=\"bta-ltx-wrap bta-ltx-trust-row\"\u003e\n\u003cspan class=\"bta-ltx-trust-item\"\u003e\u003cb aria-hidden=\"true\"\u003e✓\u003c\/b\u003e Iron is the rock, not a coating\u003c\/span\u003e\u003cspan class=\"bta-ltx-trust-item\"\u003e\u003cb aria-hidden=\"true\"\u003e✓\u003c\/b\u003e Hard ferricrete pisoliths\u003c\/span\u003e\u003cspan class=\"bta-ltx-trust-item\"\u003e\u003cb aria-hidden=\"true\"\u003e✓\u003c\/b\u003e Slow-release root iron\u003c\/span\u003e\u003cspan class=\"bta-ltx-trust-item\"\u003e\u003cb aria-hidden=\"true\"\u003e✓\u003c\/b\u003e Won't cloud or compact\u003c\/span\u003e\u003cspan class=\"bta-ltx-trust-item\"\u003e\u003cb aria-hidden=\"true\"\u003e✓\u003c\/b\u003e Australian basalt laterite\u003c\/span\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-intro\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\u003cdiv class=\"bta-ltx-intro-box\"\u003e\n\u003cstrong\u003eLTX is true pisolitic iron laterite\u003c\/strong\u003e — rounded iron-cemented grains weathered from iron-rich basalt over millions of years. Most products sold as \"laterite\" are soft bauxite grit: alumina grains with a bit of incidental iron. LTX is different rock entirely. The iron is the structure itself, which is why the grains stay hard, stay porous, and keep feeding roots season after season.\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section\" aria-labelledby=\"word-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eA word on laterites\u003c\/div\u003e\n\u003ch2 id=\"word-title\" class=\"bta-ltx-section-title\"\u003eLaterites ain't \u003cspan\u003elaterites.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-editorial\"\u003e\n\u003cp class=\"bta-ltx-drop\"\u003eThe word \"laterite\" gets stretched over half the mineral grits on the market. It comes from the Latin \u003cem\u003elater\u003c\/em\u003e — brick — a nod to the way the iron-rich versions bake hard in the sun. But not every \"laterite\" is the same rock, from the same parent, shaped by the same weathering. If you're feeding roots, the differences matter.\u003c\/p\u003e\n\u003cfigure class=\"bta-ltx-showcase\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTX_hero_pic_2.jpg?v=1790125875\" alt=\"Pisolitic iron laterite pisoliths — rounded iron-cemented grains in close detail\" width=\"1360\" height=\"600\" loading=\"lazy\" decoding=\"async\"\u003e\u003c\/figure\u003e\u003cdiv class=\"bta-ltx-edit-grid\"\u003e\n\u003carticle class=\"bta-ltx-edit-card\"\u003e\u003ch3\u003eIt starts with the host rock\u003c\/h3\u003e\n\u003cp\u003eEverything a laterite can become was already sitting in the parent rock before weathering began. LTX forms on iron-rich basalt — ancient lava flows that carried roughly a tenth of their weight in iron from the day they cooled. Millions of years of deep subtropical weathering leached away the silica and light minerals and left the iron behind, residually concentrated it. Most of the \"laterite\" sold into aquatics and gardens starts from the opposite place: pre-leached quartz sandstones and sediments that were poor in iron from the beginning. Tens of millions of years of tropical rain stripped what little iron they had and concentrated alumina instead. That's not laterite in the brick sense — that's bauxite grit wearing laterite's name.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-edit-card\"\u003e\u003ch3\u003eAge matters, but only through what it does\u003c\/h3\u003e\n\u003cp\u003eThe tropical bauxite landscapes of the far north have weathered relentlessly for something like 50 million years. The result is soft, earthy pisoliths of aluminium hydroxide with a dusting of iron. The basalt profiles behind LTX are younger, deeper weathering systems — intense enough to build proper rounded pisoliths and cement them with residually concentrated iron, not so extreme that the iron itself has been stripped away. The iron-cemented kind is what the word laterite was coined for: the brick-making rock.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"bta-ltx-edit-sub\"\u003eRoughly, what's in the rock?\u003c\/h3\u003e\n\u003cp class=\"bta-ltx-edit-note\"\u003eGeneral deposit-scale figures, dry basis — the rock class, not a certified batch analysis.\u003c\/p\u003e\n\u003cdiv class=\"bta-ltx-compo\" role=\"group\" aria-label=\"General iron and aluminium content comparison\"\u003e\n\u003carticle class=\"bta-ltx-compo-col bta-ltx-compo-col--ours\"\u003e\u003ch4\u003ePisolitic iron laterite (LTX)\u003c\/h4\u003e\n\u003cdiv class=\"bta-ltx-bar-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-bar-label\"\u003e\n\u003cspan\u003eIron oxide — Fe\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\u003c\/span\u003e\u003cstrong\u003e~25–40%\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar bta-ltx-bar--iron\" aria-hidden=\"true\"\u003e\u003cspan style=\"width:33%\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-bar-label\"\u003e\n\u003cspan\u003eAluminium oxide — Al\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\u003c\/span\u003e\u003cstrong\u003e~50%\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar bta-ltx-bar--alumina\" aria-hidden=\"true\"\u003e\u003cspan style=\"width:50%\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"bta-ltx-compo-note\"\u003eSilica in single digits. A few percent titanium. Negligible organics.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-compo-col bta-ltx-compo-col--theirs\"\u003e\u003ch4\u003eBauxite-type \"laterite\"\u003c\/h4\u003e\n\u003cdiv class=\"bta-ltx-bar-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-bar-label\"\u003e\n\u003cspan\u003eIron oxide — Fe\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\u003c\/span\u003e\u003cstrong\u003e~5–20%\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar bta-ltx-bar--iron\" aria-hidden=\"true\"\u003e\u003cspan style=\"width:12%\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-bar-label\"\u003e\n\u003cspan\u003eAluminium oxide — Al\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e\u003c\/span\u003e\u003cstrong\u003e~75%\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-bar bta-ltx-bar--alumina\" aria-hidden=\"true\"\u003e\u003cspan style=\"width:75%\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"bta-ltx-compo-note\"\u003eAlumina dominates. Iron is what survived by accident.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003cp class=\"bta-ltx-callout\"\u003eThat works out at roughly \u003cstrong\u003ethree to ten times more iron per unit of alumina\u003c\/strong\u003e in the basalt-hosted rock. No processing trick achieves that — it's the parent rock, and it was decided millions of years ago.\u003c\/p\u003e\n\u003ch3 class=\"bta-ltx-edit-sub\"\u003eThe form the iron takes is the real story\u003c\/h3\u003e\n\u003cp\u003eIn pisolitic iron laterite, the iron \u003cem\u003eis\u003c\/em\u003e the structure. Goethite (FeO(OH)) and hematite (Fe\u003csub\u003e2\u003c\/sub\u003eO\u003csub\u003e3\u003c\/sub\u003e) form the hard ferricrete cement binding every pisolith together — iron minerals right through the mass of each grain. In bauxite grit, iron is an accessory: thin hematite staining on the surface of aluminium hydroxide (Al(OH)\u003csub\u003e3\u003c\/sub\u003e) grains.\u003c\/p\u003e\n\u003cp\u003eFor plants and aquariums, that difference is everything:\u003c\/p\u003e\n\u003cul class=\"bta-ltx-checks\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocked in the water column.\u003c\/strong\u003e Iron oxides don't dissolve in oxygenated water — no leaching, no iron spikes, no feeding nuisance algae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReleased at the root.\u003c\/strong\u003e Substrate microzones turn ferric iron (Fe\u003csup\u003e3+\u003c\/sup\u003e) into plant-available ferrous iron (Fe\u003csup\u003e2+\u003c\/sup\u003e), on demand, right at the root surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrains that stay whole.\u003c\/strong\u003e Iron-cemented pisoliths are ferricrete-hard. They hold shape and porosity for good, while soft earthy pisoliths break down into mud and silt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLess alumina per feed.\u003c\/strong\u003e Lower aluminium relative to iron, and what aluminium is present stays locked up as gibbsite across the normal planted-tank and aquaponics pH range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"bta-ltx-closer\"\u003eSo when someone calls their product \"laterite\", the useful questions are: weathered from what rock? Iron as the cement, or iron as a stain? Grains that last, or grains that turn to mud? \u003cstrong\u003eLaterites ain't laterites. Ours is the brick kind.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section bta-ltx-section--panel\" aria-labelledby=\"difference-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eThe LTX difference\u003c\/div\u003e\n\u003ch2 id=\"difference-title\" class=\"bta-ltx-section-title\"\u003eIron laterite. \u003cspan\u003eNot bauxite grit.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-compare\"\u003e\n\u003carticle class=\"bta-ltx-compare-col bta-ltx-compare-col--ours\"\u003e\u003ch3\u003eTrue pisolitic iron laterite\u003c\/h3\u003e\n\u003cul class=\"bta-ltx-list\"\u003e\n\u003cli\u003eWeathered from iron-rich basalt parent rock — iron-dominant from the start\u003c\/li\u003e\n\u003cli\u003eIron minerals form the hard cement holding every grain together\u003c\/li\u003e\n\u003cli\u003eHeavy, dense, ferricrete-hard pisoliths that stay whole indefinitely\u003c\/li\u003e\n\u003cli\u003eLow alumina relative to iron — the aluminium present stays locked up across the planted-tank pH range\u003c\/li\u003e\n\u003cli\u003eVirtually free of organic matter — inert and clean\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-compare-col bta-ltx-compare-col--theirs\"\u003e\u003ch3\u003eTypical \"laterite\" (soft bauxite grit)\u003c\/h3\u003e\n\u003cul class=\"bta-ltx-list\"\u003e\n\u003cli\u003eWeathered from pre-leached sedimentary rock — alumina-dominant, iron stripped away\u003c\/li\u003e\n\u003cli\u003eIron is an accessory coating on alumina grains, not the binding mineral\u003c\/li\u003e\n\u003cli\u003eSoft, earthy pisoliths that break down into mud and dust\u003c\/li\u003e\n\u003cli\u003eHigh alumina per unit of iron delivered\u003c\/li\u003e\n\u003cli\u003eClay and organics fines that cloud water\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section\" aria-labelledby=\"features-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eWhy it performs\u003c\/div\u003e\n\u003ch2 id=\"features-title\" class=\"bta-ltx-section-title\"\u003eBuilt by geology \u003cspan\u003eto feed roots.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-card-grid\"\u003e\n\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e⬢\u003c\/div\u003e\n\u003ch3\u003eIron through every grain\u003c\/h3\u003e\n\u003cp\u003eIron minerals are the cement that binds each pisolith through its whole mass. Every particle is a mineral reservoir — not a low-iron grain with a surface dusting that washes off.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e🌿\u003c\/div\u003e\n\u003ch3\u003eSlow-release root iron\u003c\/h3\u003e\n\u003cp\u003eLocked fast in oxygenated water — no leaching, no algae-feeding spikes — then released to plant roots where substrate microzones turn it available on demand.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e⬡\u003c\/div\u003e\n\u003ch3\u003eHard grains, open structure\u003c\/h3\u003e\n\u003cp\u003eFerricrete-hard pisoliths resist compaction for good. The bed stays porous and circulating, keeping the root-zone layering planted systems depend on.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e💧\u003c\/div\u003e\n\u003ch3\u003eClear water on setup\u003c\/h3\u003e\n\u003cp\u003eWashed and screened clean of clay fines. Negligible organic matter means no bacterial bloom, no nutrient loading, no smell.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e⚖\u003c\/div\u003e\n\u003ch3\u003eStays put in flood \u0026amp; drain\u003c\/h3\u003e\n\u003cp\u003eDense grains hold position through aquaponics cycling and siphoning. No floating, no bed disturbance, no sorting to the surface.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003cdiv class=\"bta-ltx-icon\" aria-hidden=\"true\"\u003e∞\u003c\/div\u003e\n\u003ch3\u003ePermanent component\u003c\/h3\u003e\n\u003cp\u003eIt will outlast every organic part of a mix. Perlite crushes, scoria floats, bark rots — LTX keeps doing its job for the life of the system.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section bta-ltx-section--panel\" aria-labelledby=\"grades-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eGrades \u0026amp; packs\u003c\/div\u003e\n\u003ch2 id=\"grades-title\" class=\"bta-ltx-section-title\"\u003eThree cuts. \u003cspan\u003eSeven packs.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-formula\" aria-label=\"Coverage sizing formula\"\u003eLength (cm) × Width (cm) × Target depth (cm) ÷ 1000 = Litres required\u003c\/div\u003e\n\u003cdiv class=\"bta-ltx-table-scroll\"\u003e\u003ctable class=\"bta-ltx-table\"\u003e\n\u003ccaption\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e graded cuts — SKU, pack size and best-fit applications\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSKU\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSize cut\u003c\/th\u003e\n\u003cth scope=\"col\"\u003ePack\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-3-250\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3mm minus\u003c\/td\u003e\n\u003ctd\u003e250mL\u003c\/td\u003e\n\u003ctd\u003eNano tanks, bonsai soil blending\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-3-500\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3mm minus\u003c\/td\u003e\n\u003ctd\u003e500mL\u003c\/td\u003e\n\u003ctd\u003eSmall tanks, under-sand layer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-3-1000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3mm minus\u003c\/td\u003e\n\u003ctd\u003e1L\u003c\/td\u003e\n\u003ctd\u003eMid-size tanks, potting additive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-6-1000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3–6mm\u003c\/td\u003e\n\u003ctd\u003e1L\u003c\/td\u003e\n\u003ctd\u003ePlanted tanks, bonsai mixes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-6-5000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3–6mm\u003c\/td\u003e\n\u003ctd\u003e5L\u003c\/td\u003e\n\u003ctd\u003eLarge planted tanks, small grow beds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-10-5000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6–10mm\u003c\/td\u003e\n\u003ctd\u003e5L\u003c\/td\u003e\n\u003ctd\u003eAquaponics beds, drainage layers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLTX\u003csup\u003eOH\u003c\/sup\u003e-10-10000\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6–10mm\u003c\/td\u003e\n\u003ctd\u003e10L\u003c\/td\u003e\n\u003ctd\u003eBulk grow beds, trade packs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section\" aria-labelledby=\"options-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eChoosing your grade\u003c\/div\u003e\n\u003ch2 id=\"options-title\" class=\"bta-ltx-section-title\"\u003eMatch the cut \u003cspan\u003eto the job.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-option-grid\"\u003e\n\u003carticle class=\"bta-ltx-option\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTXLaterite3mmminus.jpg?v=1790125215\" alt=\"LTX laterite 3mm minus fine grade close-up\" width=\"400\" height=\"300\" loading=\"lazy\" decoding=\"async\"\u003e\u003ch3\u003e3mm minus — LTX\u003csup\u003eOH\u003c\/sup\u003e-3\u003c\/h3\u003e\n\u003cp\u003eBonsai \u0026amp; potting: blended into heavier soils and free-draining mixes. Also works under cosmetic sand or mixed through planted-tank substrate to densify the root zone.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-option\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTXLaterite3-6mm.jpg?v=1790125215\" alt=\"LTX laterite 3-6mm medium grade close-up\" width=\"400\" height=\"300\" loading=\"lazy\" decoding=\"async\"\u003e\u003ch3\u003e3–6mm — LTX\u003csup\u003eOH\u003c\/sup\u003e-6\u003c\/h3\u003e\n\u003cp\u003ePlanted aquariums: the working root layer and all-round substrate grade. Also the mineral grit fraction of bonsai mixes where finer root contact matters.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-option\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTXLaterite6-10mm.jpg?v=1790125215\" alt=\"LTX laterite 6-10mm large grade close-up\" width=\"400\" height=\"300\" loading=\"lazy\" decoding=\"async\"\u003e\u003ch3\u003e6–10mm — LTX\u003csup\u003eOH\u003c\/sup\u003e-10\u003c\/h3\u003e\n\u003cp\u003eAquaponics beds: deep flood-and-drain beds and drainage layers. Maximum open structure and flow for grow beds and large structural mixes.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section bta-ltx-section--panel\" aria-labelledby=\"crosssell-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003ePairs well with\u003c\/div\u003e\n\u003ch2 id=\"crosssell-title\" class=\"bta-ltx-section-title\"\u003eBuild the \u003cspan\u003ewhole root zone.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-crosssell\"\u003e\n\u003carticle class=\"bta-ltx-crosssell-card\"\u003e\u003ch3\u003eSUB-6\u003c\/h3\u003e\n\u003cp\u003eBTA substrate media for the living substrate bed — a structural and biological complement to the LTX mineral layer.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-crosssell-card\"\u003e\u003ch3\u003ePMX-8 Probiotic Protection\u003c\/h3\u003e\n\u003cp\u003eMicrobial biosecurity for aquatic systems — supports a balanced microbial community around the root zone and grow bed.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section\" aria-labelledby=\"included-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eWhat's included\u003c\/div\u003e\n\u003ch2 id=\"included-title\" class=\"bta-ltx-section-title\"\u003eGraded, washed, \u003cspan\u003eready to use.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-included\"\u003e\n\u003carticle class=\"bta-ltx-card\"\u003e\u003ch3\u003eScreened \u0026amp; graded\u003c\/h3\u003e\n\u003cp\u003eDry-screened into tight size fractions on a prospecting-grade screen so every pack is a clean, predictable cut.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003ch3\u003eWashed clean\u003c\/h3\u003e\n\u003cp\u003eClay and dust fines removed before packing — clear water from the first fill, not after a week of rinsing.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003ch3\u003eNatural pisoliths\u003c\/h3\u003e\n\u003cp\u003eWhole rounded grains as nature cemented them. Nothing crushed, nothing coated, nothing added.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section bta-ltx-section--panel\" aria-labelledby=\"advanced-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eGetting more from it\u003c\/div\u003e\n\u003ch2 id=\"advanced-title\" class=\"bta-ltx-section-title\"\u003eLayer it. \u003cspan\u003eDon't just scatter it.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"bta-ltx-upgrade\"\u003e\n\u003carticle class=\"bta-ltx-card\"\u003e\u003ch3\u003eThe layered bed\u003c\/h3\u003e\n\u003cp\u003eRun LTX\u003csup\u003eOH\u003c\/sup\u003e-10 at the base for drainage and flow, LTX\u003csup\u003eOH\u003c\/sup\u003e-6 as the working root layer, and LTX\u003csup\u003eOH\u003c\/sup\u003e-3 at the top under cosmetic sand. The graded stack keeps the bed open at depth and dense with roots at the surface.\u003c\/p\u003e\u003c\/article\u003e\u003carticle class=\"bta-ltx-card\"\u003e\u003ch3\u003eFor aquaponics\u003c\/h3\u003e\n\u003cp\u003eGive the bed depth — a shallow sprinkle feeds only the top few centimetres. A deep LTX bed gives roots continuous mineral contact and keeps iron deficiency off the table in fish-waste-only systems.\u003c\/p\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section bta-ltx-section--deep\" aria-labelledby=\"faq-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003cdiv class=\"bta-ltx-label\"\u003eQuestions\u003c\/div\u003e\n\u003ch2 id=\"faq-title\" class=\"bta-ltx-section-title\"\u003eFAQ\u003c\/h2\u003e\n\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eIs this the same as the \"laterite\" sold for aquariums?\u003c\/summary\u003e\u003cp\u003eNo. Most aquarium \"laterite\" is soft bauxite grit — alumina grains with some incidental iron. LTX is true pisolitic iron laterite weathered from iron-rich basalt, where iron minerals are the cement binding each grain. Different parent rock, different mineralogy, harder grains.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eWill it alter my water chemistry?\u003c\/summary\u003e\u003cp\u003eIt is an insoluble mineral substrate. The iron stays locked in oxygenated water and is released at the root surface rather than into the water column, and it is essentially free of organic matter. Intended for use across the normal planted-tank and aquaponics pH range.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eWill it break down into mud over time?\u003c\/summary\u003e\u003cp\u003eNo. The pisoliths are iron-cemented and ferricrete-hard. They hold their shape and porosity indefinitely, unlike soft earthy pisoliths that disintegrate into fines.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eDo I need to rinse it before use?\u003c\/summary\u003e\u003cp\u003eIt is washed and screened before packing, so a light rinse is all that is needed. If you want absolute clarity in a display tank, a quick rinse until it runs clear is good practice.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eWhich grade and pack size should I choose?\u003c\/summary\u003e\u003cp\u003eUse the formula above the grade table: length × width × target depth ÷ 1000 = litres required. LTX\u003csup\u003eOH\u003c\/sup\u003e-6 in 1L or 5L is the all-rounder for planted tanks. LTX\u003csup\u003eOH\u003c\/sup\u003e-3 in 250mL to 1L for under-sand layers and soil blending. LTX\u003csup\u003eOH\u003c\/sup\u003e-10 in 5L or 10L for aquaponics beds and structural drainage.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eCan I use it for bonsai and potting?\u003c\/summary\u003e\u003cp\u003eYes. Use it as the mineral grit fraction of a free-draining mix — it adds permanent structure and root-zone mineral nutrition where iron chlorosis is a common failure in low-organic mixes.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails class=\"bta-ltx-details\"\u003e\u003csummary\u003eWhat does the OH in the name mean?\u003c\/summary\u003e\u003cp\u003eIt refers to goethite (FeO(OH)) — the iron oxyhydroxide mineral that forms the hard cement binding each pisolith. It is the iron mineral responsible for slow-release root nutrition. The full name format is LTX\u003csup\u003eOH\u003c\/sup\u003e-size-volume: mineral, grade, pack.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-section\" aria-label=\"Contact us\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\u003cdiv class=\"bta-ltx-cta\"\u003e\n\u003ch2\u003eNot sure which cut you need?\u003c\/h2\u003e\n\u003cp\u003eTell us about your tank, bed or mix and we'll point you to the right grade and pack size.\u003c\/p\u003e\n\u003ca class=\"bta-ltx-button bta-ltx-button--red\" href=\"\/pages\/contact\"\u003eTalk to us\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/section\u003e\n\n  \u003csection class=\"bta-ltx-trade\" aria-labelledby=\"trade-title\"\u003e\u003cdiv class=\"bta-ltx-wrap\"\u003e\n\u003ch2 id=\"trade-title\"\u003eWholesale \u0026amp; \u003cspan\u003eTrade\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eBulk graded laterite for retailers, aquaponics builders, landscape suppliers and nursery trade. Volume pricing, repeat orders and mixed-grade pallets available.\u003c\/p\u003e\n\u003ca class=\"bta-ltx-button\" href=\"\/pages\/contact\"\u003eOpen a trade account\u003c\/a\u003e\u003ca class=\"bta-ltx-button bta-ltx-button--ghost\" href=\"\/pages\/contact\"\u003eRequest bulk pricing\u003c\/a\u003e\u003cp class=\"bta-ltx-small\"\u003eBiotech Aquatica — Australian mineral substrates for aquatic and horticultural systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\u003c\/div\u003e\n","brand":"Biotech Aquatica ","offers":[{"title":"LTXOH-3-250 - 3mm minus LTX laterite powder 250ml","offer_id":50517875884274,"sku":"LTXOH-3-250","price":18.95,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-3-500 - 3mm minus LTX laterite powder 500ml","offer_id":50517875917042,"sku":"LTXOH-3-500","price":26.5,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-3-1000 - 3mm minus LTX laterite powder 1000ml","offer_id":50517875949810,"sku":"LTXOH-3-1000","price":38.28,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-6-1000 - 3-6mm LTX laterite substrate 1000ml","offer_id":50517875982578,"sku":"LTXOH-6-1000","price":25.95,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-6-5000 - 3-6mm LTX laterite substrate 5000ml","offer_id":50517876015346,"sku":"LTXOH-6-5000","price":75.9,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-10-5000 - 6-10mm LTX laterite substrate 5000ml","offer_id":50517876048114,"sku":"LTXOH-10-5000","price":61.95,"currency_code":"AUD","in_stock":true},{"title":"LTXOH-10-10000 - 6-10mm LTX laterite substrate 10000ml","offer_id":50517876080882,"sku":"LTXOH-10-10000","price":132.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/5200\/4338\/files\/LTX_hero_picture.jpg?v=1790125875","url":"https:\/\/www.btaqua.com.au\/products\/ltxoh-pisolitic-iron-laterite","provider":"Biotech Aquatica ","version":"1.0","type":"link"}