MM aqua

How to hatch artemia cysts for feeding fish fry
1. Set Up:
Place hatching cone or similarly shaped vessel in well-lit area. Cone should be semi-translucent for ease of harvesting and light transmission.
2. Add Water:
Fill cone with one liter of water and add 11/2 tablespoons of salt. Optimum hatching temperature is 82°F (28°C).
3. Add Cysts:
Add cysts at the rate of 1 gram per liter.
4. Aerate:
Provide adequate aeration to keep cysts in suspension.
5. Hatch:
Depending upon water temperature, cysts should hatch in approximately 18-36 hours.
6. Harvest:
After hatching brine shrimp, turn off or remove aeration and wait several minutes for the shells and and baby brine shrimp (or nauplii) to separate. Newly hatched nauplii will settle to the bottom of the cone or move towards a light source; the shells will float to the surface. The egg shells are brown in color and the baby brine shrimp are more orange. Once separated, the nauplii can be siphoned from the bottom with a length of air tubing or gently drained through the bottom of the cone through a valve, if so equipped.
7. Rinse:
The warm incubation temperatures and metabolites from the hatching medium create ideal conditions for a bacteria bloom. Rinsing of the baby brine shrimp in a fine mesh net or sieve using clean fresh or salt water is important before feeding them to your fish.
8. Clean Equipment:
Tanks and brine shrimp hatching equipment should be cleaned and disinfected routinely.

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Raising the fish fry

The fry develop in a number of minutes (livebearers) to a number of weeks. When the eggs hatch, the larvae that emerge look nothing like the parent fish. Instead, the larvae have a large, yellow yolk sac and are barely able to move, let alone swim. The larvae will feed off the egg sac until all the yolk is gone. Once the yolk sac is gone, the hungry fry will begin to look for food. The fry of small fish can be first fed infusoria, "green water," or egg yolk. Later these fry can be fed larger foods like whiteworms, Daphnia, Artemia nauplii, and ground flakes. These foods are good as a first food for slightly larger fry such as those of cichlids. Once the fish grow larger, larger foods like brine shrimp, larger Daphnia, flakes, insect larvae, and chopped Tubifex worms are accepted.

25-50% of the water in the rearing tank should be changed daily. Be sure that the "new" water added has characteristics like the water taken out, because fry are sensitive to sudden changes in the water chemistry. The fry should be fed several times a day. Many species need periodic sorting by size, so that larger fish do not cannibalize smaller fish.

With favorable water conditions, regular water changes, and generous feeding, the fry should grow quickly.