lookin for a 3rd aro for my 400gal tank. my 2 seem to be pickin on eachother a bit now which is odd, they've been together for over a year already but my smaller one is going postal on the bigger one. makes me nervous as i'd hate to lose the bigger one to stress cuz the small one is snappin at him all day long now. he's done it once before but stopped after a few days. so i wanna add a 3rd to kinda break up the tention between the 2. lemme kno what u got, how much, how big, and where ur located. thanks