Okay so I have 3 Convicts, 2 Pink males and 1 black female. Well the smaller one of my males and my female were a breeding pair and the bigger male is there son. Well I bought them from a friends older sister. When my bf and I brought them home & acclimated them she followed her mate around for bit. But their son and her have paired up now and he's being nippy now with the old mate (to the point he was getting depressed I had to move him to my 10 gallon till we get our 30g started up and through cycle. What do I do about this?