for one, you need to shine a light on it both for warmth and for the light. for two, the micro bubbles produced by an airstone will kill the BBS so dont use that. and for three, if you just let the water sit after the eggs have hatched, the unhatched eggs will sink to the bottom, live ones just above that, and hatched eggs will be floating.
here is how i hatch them for my freshwater tanks.
take a 2 liter pop bottle and cut the bottom off. poke a hole in the bottom that you just cut off so you can put a piece of stiff airline through it. either invert the bottle in a mason jar or hang it so its upsidedown. add the following to the upside down bottle:
1/2 teaspoon of salt
1/4 teaspoon of eggs
2 cups of warm water
with all of this in the bottle, put the bottom that you cut out back on the bottle backwards (upsidedown), so the bottle is sealed. put a piece of stiff airline through the hole that you poked in the bottom so it goes all the way down and touches the cap. connect the airline to a pump so it can bubble. shine a light on it, i use a 100w incandecent desk light about 5 inches away, and let it go for about 18-24 hours.
once finished, turn off the pump and water and let sit, but leave the airline in the bottle. you'll notice the layers that i talked about earlier begin to form nicely after about 15 min. use the airline as a siphon and suck all the brine shrimps out into another cup. before adding the shrimp to the tank, use a brine shrimp net, available at any pet store, and separate them from the water that they were hatched in.
when you buy brine shrimp eggs, be sure the buy the highest hatch out rate eggs as possible. i buy mine from
www.brineshrimpdirect.com and get the premium eggs with a 95%+ hatch rate
