Hi Stacy,

You need 'newly hatched ' brine shrimp.
The ones sitting on a pet store shelf are too big.
They are very easy to culture. Purchase aquarium salt as well. ( it's part of the 'recipe')
You will also need a little cheap air pump and air stone. You don't need to purchase that bottle thing.
They will hatch in any container--- with lots of air bubbles.
Heads up--- If I recall correctly --- its take 5-7 days for them to hatch.

Brine Shrimp Eggs

Good luck !