I use four eyed and a reef butterfly in one of my tanks that have frogspawn, hammers, leathers, zoos, ricordia. Pretty cool fish. I feed them(and all my fish) the red brine that I grow myself in my brin shrimp reactor. Big fat red ones, not to mention. Butt, the butterfly fish seem to like it better than blood worms, but they do like blood worms though.