i have one that came with my tank, and my lfs recently got a few smaller ones in. we were interested in picking up two more soon but i just want to be sure they won't fight.. i've read that the males will fight. does anyone know anything about them? i have a hard time googling them...i really can't find anything about keeping them in an aquarium.. and if the males fight, is there a way to tell which genders they are? mine is about two inches and the ones at the lfs are about an inch if i remember correctly