why not?, try it, we feed ours a combination of frozen squid and brine shrimp, which we alternate with spectrum pellets, and 2 different flake foods, just make sure there aren't any preservatives in it that you would not want in the tank, and if the fish like it, they'll eat it, and if not, they won't, but if you are using frozen, i would reccommend using vitamins and garlic on a regular basis