01 · AquaGrow
What it is
Artemia are small brine shrimp used as live feed. Low hatch output may involve the cyst lot, storage or hatching conditions. A high count alone does not establish cleanliness or nutritional suitability.
Signs to watch for
- Low or inconsistent hatch output.
- Weak live Artemia or excessive unhatched material.
- Results vary between comparable vessels or lots.
Common causes
- Cyst quality, identity or storage differs.
- Hatching conditions or equipment are not controlled.
- Counting, harvest or separation methods introduce error or debris.
How to confirm the cause
- Compare the cyst lot, storage history, inputs, conditions and counting method.
- Have the live-feed specialist examine hatch quality and contamination concerns before release.
What to do immediately
- 1
Identify and hold a suspect lot until assessed.
- 2
Check hatching equipment, water and procedure against the verified plan.
- 3
Arrange suitable replacement live feed if the supply is short. Do not feed unassessed debris or repeat chemical processing by guesswork.
Prevention: your practical checklist
- Keep lot and storage records and compare controlled hatch checks.
- Maintain separate live-feed vessels and clean equipment.
- Use documented harvest, separation and release procedures.
When to call an expert
- Seek prompt support if a feed shortage threatens feeding larvae.
- Escalate for recurring weak live feed or larval decline after use.
Farmer questions
Does low hatch always mean a bad cyst brand?
No. Storage, conditions, procedure and counting should be checked with the lot history. Avoid conclusions from one uncontrolled test.
Does a good hatch prove the feed is pathogen free?
No. Hatching performance and contamination control are different checks. Follow the live-feed health and release plan.
Should I copy a decapsulation recipe online?
No. Chemical handling and processing require a validated procedure and trained staff. This guide does not provide a safe universal recipe.
Sources & further reading
AI-assisted educational content and translations, source-checked 17 October 2026. Not an individual diagnosis or prescription. Independent aquaculture-health and native-language specialist approvals have not been supplied. Sources do not endorse AquaGrow.
- SHAPHARI hatchery operating guidelines — production, biosecurity and records ↗MPEDA; linked guideline, not AquaGrow certification or a legal-compliance audit
- Hatchery operations and assessment framework (2007) ↗FAO FTP 446; historical P. monodon manual, not a vannamei treatment protocol