I currently have 3 - 2 together in my 12g and 1 with a black clown in a 14g - oddly those two get along great. Anyway, they really will eat anything, I rotate every day between marine flakes, pellets, formula 1 pellets, mysis shrimp pellet cubes, brine shrimp cubes and blood worms. They even snack on scallops, clams and shrimp when I buy it for my other guys.