yeah like Volks said, a goby or blennie would be nice, i have a lawnmower blennie and he is awsome, cleans like a freak, not the pretiest fish but cool to watch. Also a sand sifting goby, then clean the top layer of sand amazing. It picks up sand eats whats good and the clean sand comes out its gills, its cool to watch. Now if you have a reef and you want some reef safe fish, Blue jaw trigger, there like the only mello and reef safe trigger, but there awsome. You can also add a few of them they say. I have one a male, but im looking for a female.