I have 4 md-lg hairy hermits, a bunch of lg. turbo snails, 3 different conch's, a spiny oyster and a cowrie about 4" which in one day-ate a colony of at least 40 zoo polyps. (worth it for the clean tank) This is my clean up crew for a 215gal. with a 2ft long brazillian dragon eel, aussie tusk wrasse 6", blue throat trigger 6", bird wrasse 6" and puffer 6".