Integrated Bio-Hatchery Protocol (IBHP)

Sterilize → Neutralize → Colonize → Enrich

A Biosecure, Probiotic-Driven Approach to Live Feed Production

Update Version - 2.2.2026

In short, four logical steps greatly reduce the chance of disease and significantly increase the nutritional value of newly hatched Artemia. They are summarized below and explained in detail in the protocol.

Step 1: Sterilize (Vessel Preparation & Rehydration)

Action: Sterilize the hatching vessel and rehydrate cysts to remove pathogens and chemical residues.

• Recommended Method: Use Sodium Percarbonate (0.25g per Liter) in clean seawater at 20 PPT.
• The Chemistry: Sodium Percarbonate contains approximately 32.5% Hydrogen Peroxide by weight. Therefore, a dose of 0.25g/L releases approximately 81 ppm (mg/L) of Hydrogen Peroxide.
• Dosing Context: This dose rate is safe for a rehydration rate of cysts of approximately 2 grams per Liter.
  • Note: As higher amounts of cysts (in grams per Liter) are used, you may need to increase the amount of Sodium Percarbonate because there is more organic waste for the same volume of water. We will continue to update this protocol as we dial in the exact ratio of Sodium Percarbonate per gram of Artemia cysts.
• Why: It creates a "soft" clean using active oxygen and high pH to scrub cyst shells and stress pathogens.
• Critical Note for Magnetic Cysts: If you are using magnetic separation cysts (e.g., Sep-Art), you must perform a test to ensure the Sodium Percarbonate does not affect the magnetic coating.
• Aquaculture Note: If using Chlorine or Virkon to sterilize the external shell, you must check for residuals. However, the subsequent draining step significantly mitigates this risk.

Step 2: Neutralize (The Water Swap)

Action: Physically remove the "dirty" oxidative water and replace it with probiotic-rich water.

• The "Neutralization" Process: After 6–12 hours (once the oxidative reaction has subsided and cysts are rehydrated), drain the entire vessel through a sieve of approximately 150 to 200 microns.
  • Function: This screen size will retain the biological mass (cysts) while letting all the dirty water through. Stop draining before the cysts are exposed to air/dry out.
  • Optional Rinse: You can rinse the cysts with a little clean water at this stage if you like. This is especially important if you used Chlorine or Virkon in Step 1 to ensure any residuals are removed.
• Chemical Breakdown: As Sodium Percarbonate breaks down, it separates into Hydrogen Peroxide and Sodium Carbonate. This adds alkalinity and active oxygen to the water, which essentially neutralizes itself over time. The increased pH from the Sodium Carbonate helps to lyse the outside of the cyst/shell, working in tandem with the Hydrogen Peroxide to sterilize the surface.
• The Refill: Rinse the cysts back into the vessel using fresh, aerated water that has already been inoculated with probiotics.
• Why: This prevents the "Sterile Vacuum." Cysts continue their development in a bath of beneficial bacteria rather than a chemical soup.

Step 3: Colonize (The Hatch & Separation)

Action: Hatch the Artemia in a probiotic environment and separate the nauplii from the shells.

• The Hatch: As the Artemia hatch, they emerge into a "probiotic soup."
  • Biological Note: At this stage (Instar 1), the nauplii do not have a functional mouth or anus, so the probiotics do not colonize the gut yet. Instead, the beneficial bacteria coat and colonize the external surface of the nauplii. If some nauplii progress to Instar 2, they may begin to feed on the bacteria, which is also beneficial.
• Probiotic Action: The probiotic does not just exclude pathogens via Competitive Exclusion; it also produces digestive enzymes and metabolites that are antagonistic to disease.
  • Product Choice: Obviously, it depends on what probiotic you use. Here at BTA, we use our Microplex or a blend for food inoculation, but you can use whatever you find to be effective. We can, of course, help you with that selection.
• Separation: Once hatching is complete, separate the nauplii from the unhatched cysts and empty shells.
  • Option A (Magnetic): If using magnetic cysts, run the harvest through your magnetic separator.
  • Option B (Standard): Use the flotation/separation method to separate shells from the live nauplii.
• Cleanliness Strategy: By performing this separation step before enrichment, you remove unhatched and hatched cysts from the water. If you are using normal cysts (Option B), this allows you to perform a second quick separation after the enrichment phase. This results in very, very clean enriched nauplii that are covered in nutritional enrichment and beneficial bacteria, without the contamination of shells.
• Important Note: Do not sterilize the nauplii after harvesting. You have already sterilized the shells in Step 1 and colonized the nauplii with probiotics in Step 2. Sterilizing now would destroy the beneficial coating you have just achieved.

Step 4: Enrich (The Boost)

Action: Boost the nutritional profile of the clean, colonized Artemia.

• Scenario A: The Hobbyist (Same Vessel)

  • Procedure: After separating the shells, return the clean nauplii back into the same hatching vessel along with the water they are currently in (minus the hatched and unhatched shells you just removed).
  • Method: You can top up with a little bit of extra clean, probiotic-laced water if you like. Then, add your enrichment media directly to the vessel.
  • Enrichment Choice: Any enrichment is fine—anything with EPA, DHA, etc., for live foods. Here we recommend our Enrich-UM product, but you can use whatever works for you and whatever is in your standard operating procedure.
  • Benefit: Saves space and equipment. Since the water and Artemia are already colonized, there is no need for a new "clean slate."

• Scenario B: Aquaculture Production (Separate Vessel)

  • Procedure: Transfer the clean, colonized nauplii to a dedicated Enrichment Vessel.
  • Method: This vessel should be pre-filled with clean water and probiotics, and must be aerated to help the probiotics survive and provide oxygen for the Artemia nauplii.
  • Enrichment Choice: Add your preferred enrichment media (we recommend Enrich-UM, but you can use whatever you prefer).
  • Benefit: This frees up your hatching vessels immediately for the next production cycle, allowing you to maintain a tight rotation schedule.

It’s a few extra simple steps that result in a far higher quality end product.

And it makes SENSE!

Ever looked at your hatchery protocol and thought, "that don't seem right... at all"?

Or wondering why the probiotics you are adding are not working?

It’s not you, and it’s not the probiotics.

It’s the way you've been told to do it.

And it’s wrong.

1. The Philosophy: Why the Industry Standard Fails

The Current Issue:

Standard commercial protocols often recommend a "cocktail" approach: adding disinfectants, cysts, and probiotics simultaneously, or adding probiotics into water that still holds residual sanitizers.

• Biological Conflict: Disinfectants are non-selective; they kill beneficial bacteria (probiotics) just as effectively as they kill pathogens.
• Economic Waste: Data indicates that residual sanitizers can reduce the viability of applied probiotics by >90%. Following these (flawed) protocols means you are effectively pouring premium product down the drain.
• The "Sterile Vacuum": Sterile water has no biological buffer. Once the sanitizer dissipates, the water becomes a vacuum. The first bacteria to enter (often opportunistic Vibrio from the air or cyst shells) will dominate the system.

The IBHP Solution:

We treat the hatchery and enrichment vessels not as sterile buckets, but as Controlled Biofloc Reactors. The goal is Competitive Exclusion and colonization by probiotic microbes: We sterilize the equipment to create a blank slate, remove all chemical traces, and THEN flood the system with beneficial bacteria to occupy every biological niche before pathogens can establish themselves.

2. The Protocol Steps & Rationale

Phase A: Hatching Vessel Preparation (Sterilize)

Objective: To create a pathogen-free environment without leaving toxic chemical residues.

Method Option 1: The Traditional "Hard" Clean (Chlorine/Virkon)

• Procedure: Sterilize the vessel and cysts using standard commercial disinfectants.
• The Issue: These chemicals bind to plastics and biofilms. Even after a quick rinse, they leach back into the water, creating a "kill zone" for probiotics.
• The IBHP Fix: You must Rinse, Neutralize (using Thiosulfate if using Chlorine), and Rinse again.
• Mandatory Check: Use a test kit (e.g., DPD Chlorine test) to ensure ZERO RESIDUALS. If the test registers any chemical presence, do not proceed until it is rectified.

Method Option 2: The Oxidative "Soft" Clean (Sodium Percarbonate) – Recommended

• Procedure: Fill the vessel with clean seawater (20 PPT). Dose Sodium Percarbonate at 0.25g per liter of water. This adds approximately 81ppm of hydrogen peroxide and increases alkalinity.
• The Rationale: This acts as your primary disinfectant alternative. The high pH serves to osmotically stress and lyse any pathogens, sometimes killing them directly, and greatly enhances the effectiveness of Hydrogen Peroxide which finishes the job. The Sodium Percarbonate releases Active Oxygen Species that vigorously scrub the vessel walls and, crucially, sanitize the outside of the cyst shells.
• The Solution to Residues: Unlike chlorine, these chemicals degrade into Water, Oxygen, and Carbonates. They dissipate naturally.
• Why this is better: You achieve sanitization and shell-cleaning without leaving a toxic footprint. The byproduct (Oxygen) actually aids the hatching process.
• Critical Note: Active oxygen can be harmful to sensitive organisms.
  • Magnetic Cysts: If using magnetic separation cysts (e.g., Sep-Art), you must do a test to check whether the Sodium Percarbonate affects the magnetic separation process.
  • Aquaculture: If using Chlorine or Virkon to sterilize the external, check for residuals before the next step.

Phase B: Probiotic Colonization (Neutralize & Colonize)

Objective: To dominate the water column with beneficial bacteria immediately.

• Procedure (Neutralize): After 6-12 hours, after the oxidative reaction has subsided, drain the entire vessel through a 150-200 micron sieve to remove the dirty hatching water. This is the neutralization step—physically removing the waste.
• Procedure (Colonize): Rinse the cysts back into the hatching vessel with water that has been aerated and already inoculated with Probiotics (this is your sterile biofloc). This removes waste, dead bacteria, and heavy metals that have now been removed from the outside cyst walls of the Artemia eggs/cysts.
• The Issue with Standard Methods: Usually, probiotics are added too late or into toxic water. Pathogens on the cyst shells hatch alongside the Artemia and infect them immediately.
• The IBHP Fix: By draining the dirty water from phase one, and adding clean, pre-inoculated water back to the vessel, we are adding probiotics to clean water with very little pathogen load. They colonize the surface of the cysts. As the Artemia hatch, they emerge into a "bath" of beneficial bacteria. The probiotics consume the metabolic waste (ammonia) from the hatching process, maintaining high water quality, and colonize the Artemia when they hatch.

Phase C: Separation

Objective: To separate the live nauplii from the waste shells without breaking the biosecurity chain.

• Procedure: Once the hatch is complete, separate the nauplii from the shells.
  • Magnetic Separation: If using magnetic cysts, use the magnetic separator now.
  • Flotation: If using standard cysts, use the flotation method to separate shells.
• Crucial Point: Do not sterilize the nauplii here. You have already sterilized the shells in Phase A and colonized the nauplii in Phase B. Sterilizing now is redundant and detrimental to the probiotic coating.

Phase D: Enrichment (Enrich)

Objective: Gut-loading and external protection.

Option A: The Hobbyist Path (Same Vessel)

• Procedure: Return the separated, clean nauplii to the existing hatching vessel along with their current water (minus shells).
• Method: Top up with clean probiotic water if desired, and add enrichment media (e.g., Enrich-UM, EPA/DHA products).
• Why: The Artemia are already colonized. This saves setting up a second tank.

Option B: The Aquaculture Path (Separate Vessel)

• Procedure: Transfer the nauplii to a dedicated Enrichment Vessel.
• Method: This vessel should be pre-filled with clean water and probiotics, and must be aerated. Add your preferred enrichment media (e.g., Enrich-UM).
• Why: If you have a production schedule, you want to maintain your hatches for hatching. Using a separate vessel for enrichment frees up the hatcher for the next batch immediately.

Phase E: Setup of the Biofloc Reactor (Aquaculture Approach) [Pre-seeding]

Objective: To create a mature, vegetative bacterial colony prior to the nauplii being harvested and placed into the enrichment vessel.

• Procedure: 12-24 hours before harvest, fill the sterile enrichment tank with sterilized seawater and add Microplex with strong aeration.

• The Rationale: You obviously have probiotics in the hatching water after the first drain of dirty sterilized water, which allows for good water quality in the hatching vessel and pre-inoculation. However, you want to make sure that you are getting all beneficial bacteria and enzymes that you possibly can onto the outside of these animals and into their gut.

• The "Best of Both Worlds":

  • Probiotics: We want to gut-load them with probiotics and beneficial bacterial enzymes to seed their gut flora.
  • Enrichment: We need to add the nutritional boost. Depending on when you catch the hatch of your brine shrimp, they absorb their energy in their yolk sac very quickly. Furthermore, breaking out of a shell requires significant energy expenditure. Adding extra enrichment is always a good idea and has been proven scientifically in peer-reviewed papers time and time again to make a significant difference to growth rates.

• Operational Flexibility:

  • Efficiency: You could have one enrichment vessel servicing three hatching vessels. You can harvest multiple hatches and enrich them all in one go.
  • Salinity Control: This step allows you to enrich in either Freshwater or Seawater. If you have freshwater fish, you can transfer the nauplii to a freshwater enrichment vessel (or keep them in salt) depending on whether you want to introduce salt into your stock tanks.

• The Result: A physically robust, nutritionally superior, and biosecure live food organism. Coated in powerful probiotics, in a way that effectively delivers them to your larvae for maximum benefit.

Sounds logical to me.