Well i have 12 of them 1 is 3" and totally runs my 125 gal tank,he owns my 4 inch Texas,my 5 inch Dempsey and everything else,except a 2 inch Firemouth who when he flares his red gills my Dovii runs scared,i also have 11 one inch babies and the only damage they do is to thier freeze dried krill.But i cant wait till wich ever ones i keep grows into wild beasts!!