okay i have a 50 gallon salt tank that houses 2 occelaris clowns, 1 cleaner shrimp, 1 pistol shrimp, 4 firefish, 1 wheelers watchman goby, adn 1 tiny (1.5 inch from nose to tail) blue tang that is going back to the lfs once it grows too big. yes they said they would take him back. now for the question. i have like an algae carpet on the back glass of the tank that i cant reach to scrape off. i was wondering if there was a fish that could eat all of this? yes i do have the whole CUC and they are doing great but there is too much for them to eat completely.