I prefer to feed pelleted food, ie Hikari Lionhead, Hikari Bio Gold, Hikari Oranda etc They work wonderfully and really brind ouut the colours in the fish. My goldies will eat most frozen things, bloodworms, brineshrimp etc and they love frozen community blocks. They also love peas, buy frozen peas, defrost them and pinch them and the shell will come off, and you feed them the two halves inside.