I feed mine Formula 1 flake, Formula 2 flake regularly plus some frozen brine now and then, a variety pack of frozen foods now and then, some nori from the oriential section in the grocery store now and then, live cracked open black mussels from the deli now and then, and caulerpa from the fuge. They'll eat anything and everything. They need to eat several times a day or a lot a least once a day.