I have a 120 gal community tank that I have 4 koi angels in. They have been together for about a year. I have a pair out of the four. Obviously the two that have paired off have dominated the tank and I mean the entire tank. The other two stayed primarily to one end and they are all healthy. Lately though one of the two singles have kind of joined the pair and they pick on the other single one. It's kind of like the pair tolerate the one angel and allow him/her to be at their end but the other single one has to stay at the other end. What's interesting is the one that is being forced to stay alone at one end of tank has always been a bit challenging to the male of the pair. I feel bad and not sure what to do. I have a 29 gal that is not being used, should I set it up and put one or two fish in there?
Thanks for your help
Thanks for your help