I bought a kit on ebay and it came with brine shrimp eggs that you hatch along side the killies. They give you a dropper and you are supposed to put a few drops of brine shrimp in there everyday. Today was the first day I had live brine shrimp to feed them they hatched a day later than the fish. They swallow them right up I was amazed. The instructions say that within two moths the fish will be full grown. You have to keep transferring them to bigger vessels. I think thye eat brine shrimp their whole life, but I am not sure. I am going to email the seller with that question.