My convicts are on their 3rd batch of fry and were attacking all of my other fish in my 90 gallon tank so I bought a 40 gallon tank just for them and their babies and I just moved the pair and most of their fry (as many of them as I could catch) over to the new tank today and now the pair are fighting. The female is staying with the babies and keeps attacking the male if he gets too close or even close to their fry. What's going on with them? Should I move my male back to the big tank?