I already had a sargassum and blue jaw before I added him. The hermits,cleaner shrimp and fire shrimp all became strictly nocturnal feeders, they disappear into the rocks when the lights come on. He doesn't bother any corals, when he gets fiesty he picks on the austerina stars. I don't think there are any secrets, my fish do get 8 cubes of Hikari frozen everyday.