My girlfriend recently got two blue/yellow cross rams for her densly planted 20 gal long tank. One male (1 inch) and one female (1 1/4 inch). The male has been very aggressive towards the female, especially at feeding. It has gotten to the point that the female has recieved some bad cuts on her head and may have some damage to her eye. Is there something that can be done to ease this aggression other than removing one of the fish?