Dont put a grouper in a 55 gallon tank. Get a yellow tang . Maroon clowns get bigger than the other clowns if your wanting a fish with more size on it like i do (they get up to 6 inches). Only get one or a mated male and female and watch em . Dont get tons of each kind of fish, keep it to one avoid fighting their own kind. Never put any aggressive large fish in a 55 or it will kill your other fish. The maroon clowns dont need anemone if you dont have the lighting to keep anemone alive. Then get a bunch of blue leg hermits and maybe a shrimp and a turbo snail. Dont get more than one shrimp until you check if they get along wiht other shrimp. I got a coral banded and keep it alone. If you get fish that grow massive they will tear up the smaller tank , fowl the water and eat your other fish.