i have a 55 gal. but i made a huge mistake in it. i started it about 2 years ago with damsels. BIG MISTAKE!!! the 2 that are left are 3 stripe. they have picked and bullied everything that i have put in there : 2 manderine dragonettes, 1 false percula clown, 1 pretty big maroon clown, tang(i know, i know -Flame me), lawnmower blenny, and some others i can't remember.
if you have any damsels, get them out.
some good fish are: Manderine Dragonettes, lawnmower blenny, clowns, royal gramma. people on here tell you not to get tangs, but mine lived for around a year and a half before the damsel nipped him to the point of death.