I recently got a pair of red devils the male is 10" and the female is around 6" or so they are in a 125 gallon with 2 jack dempseys 2 firemouth 2 convicts and a 12" RTC. The male R D just thrashes the female so i divided the tank so she can beef up for him. I would think that since there are other fish in the tank that he would focus on attacking them but he almost always goes for her. Any ideas on what i should do?