How to hatch brine shrimp at home in 24 hours
The freshest, most nutritious live food your fish will ever eat. Premium eggs, simple setup, thousands of live nauplii ready to harvest tomorrow morning. No experience required.
What you need
Hatching brine shrimp is one of the simplest live food skills in the hobby. You do not need expensive equipment or specialist knowledge. A basic setup costs under £20 and produces enough live food for weeks of feeding.
- Brine shrimp eggs (90%+ hatch rate recommended)
- Hatching vessel (purpose-built hatchery or inverted 2L bottle)
- Air pump with airline tubing
- Marine salt (non-iodised)
- Dechlorinated water or RO water
- Light source (LED lamp or desk light)
- Fine mesh sieve (100 micron) for harvesting
- Optional: heater to maintain 26-28°C
The single biggest factor in hatch success is egg quality. Cheap eggs produce hatch rates of 40 to 60 percent, wasting time and money. Premium eggs with a stated 90%+ hatch rate deliver consistent results every time. Start with good eggs and everything else falls into place.
How to hatch brine shrimp step by step
Follow these six steps and you will have live baby brine shrimp ready to harvest within 24 to 36 hours.
Prepare the saltwater
Fill your hatching vessel with 1.5 to 2 litres of dechlorinated water. Add 1 tablespoon of marine salt per litre. Target salinity: 1.018 to 1.022 specific gravity.
Set up aeration
Connect your air pump and run the airline to the bottom of the vessel. You need steady, gentle bubbling that keeps eggs suspended without violent churning.
Add brine shrimp eggs
Add half a teaspoon of eggs. Do not overload. Overcrowding reduces oxygen and actually lowers hatch rate. Less is more with brine shrimp.
Light and warmth
Position a light source within 20cm. Maintain temperature at 26 to 28°C. At this temperature, eggs hatch in about 24 hours.
Wait for the hatch
After 24 hours, the water takes on an orange-pink tinge. Shine a torch at an angle and you will see thousands of tiny nauplii swimming toward the light.
Harvest and feed
Turn off the air pump. Wait 5 minutes for layers to separate. Siphon the live nauplii from the middle through a fine sieve. Feed directly to your fish.
When you turn off the air pump, three layers form naturally. Unhatched eggs sink to the bottom. Empty shells float on top. Live nauplii concentrate in the middle, attracted to any light source. This makes harvesting clean and simple without needing to sort through debris.
Target parameters for maximum hatch rate
Getting these three variables right is the difference between a 50 percent hatch rate and a 90 percent hatch rate.
Brine shrimp nauplii are sensitive to high temperatures. Keep the hatchery below 30°C at all times. If your room runs warm, move the hatchery away from direct sunlight and heat sources.
Enriching brine shrimp before feeding
Freshly hatched brine shrimp are most nutritious within the first 12 hours while they still carry their yolk sac. After that, nutritional value drops sharply.
For breeders and keepers of demanding species, enriching the nauplii before feeding dramatically improves their value. Dose live phytoplankton or our specialist enrichment blend into the hatchery water four to six hours before harvest. The nauplii ingest the enrichment, loading them with EPA, DHA, and essential fatty acids that support growth, colouration, and immune function in your fish.
Common hatching problems
Low hatch rate
Most commonly caused by poor quality eggs. Switch to premium grade with a stated 90%+ hatch rate. Also check salinity, temperature, pH, and aeration.
Eggs settling on the bottom
Aeration is too weak. Increase air flow until eggs are constantly rolling in the water column. A purpose-built hatchery with a conical base keeps eggs suspended naturally.
Bad smell from the hatchery
Bacterial contamination or dead eggs decomposing. Start a fresh batch with clean equipment and new saltwater. Clean your hatchery thoroughly between every batch.
Cannot separate nauplii from shells
Turn off the air and wait longer. The layers need 5 to 10 minutes to form properly. Alternatively, use decapsulated eggs which eliminate the problem entirely.
Decapsulated brine shrimp eggs have the outer shell chemically removed. No shells means no separation needed, no risk of fry ingesting indigestible material, and cleaner harvesting. They can also be fed directly to fish without hatching.
Shop brine shrimp products
Brine Shrimp Eggs
Premium grade eggs. Consistent results every batch. Weeks of live food in a single tin.
Shop EggsBrine Shrimp Hatchery
Conical design keeps eggs suspended. Simple harvesting. Consistent results without DIY.
Shop HatcheryDecapsulated Eggs
No shells to separate. Safe for delicate fry. Can also be fed unhatched as a direct food.
Shop DecapsulatedEnrichment Blend
Gut-load nauplii before feeding. Turns basic brine shrimp into premium nutrition.
Shop EnrichmentBrine Shrimp Feed
Grow hatched nauplii into full-size adult brine shrimp for larger fish.
Shop FeedAir Pump
Essential for keeping eggs suspended and oxygen levels optimal throughout hatching.
Shop Air PumpDownload the complete guide
Our printable PDF guide covers everything in more detail: egg comparison, salinity and pH science, enrichment techniques, growing brine shrimp to adult size, troubleshooting common problems, and how brine shrimp fit into a complete live food system alongside copepods, rotifers, and phytoplankton.
Download: How to Hatch Brine Shrimp at Home - The Complete Guide (PDF)
Printable step-by-step guide with egg comparison table, parameters, enrichment techniques, troubleshooting, and live food system building.
Download this guide
Want a printed copy to keep next to your hatchery? Download the complete guide as a PDF.
Download PDF GuideShop Brine Shrimp Eggs
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Shop Brine Shrimp EggsAsk Darren
Brine shrimp are the simplest live food you can produce at home. Twenty-four hours from eggs to feeding. Pence per batch. A feeding response that no frozen or dried food can match. Once you see the difference live food makes, you will not go back. If you have questions, get in touch.
Darren
Founder, Reefphyto Ltd - Wales, UK - Est. 2008