Oh yeah i also give them TetraMin tropical tablets. They have protein in them. I've tried algae wafers but they don't eat them they just leave it on the bottom of the tank then algae ends up taking over the tank.. I bought some java moss when I first got my marbled crays and they ate it all up within a week.. I probably should have done my research.. oh well. I think I'm going to end up buying some more crays and see if i just have 2 that are defective and don't know what to do with their eggs after they're berried up. Maybe there's some kind of genetic problem with this species to where after so many generations some of them have lost the instinct to care for their eggs properly because I've talked to quite a few people that have these guys and some say that they've encountered some kind of problem with them berrying up. Mine just like caviar i guess..