I have some really nice SA Cichlids in my 75g 4x2x2 tank but they are starting to reach the size where aggression is becoming a problem and i am running the risk of losing fish to said aggression. My Vieja (7 inch) is the primary aggressor and is clearly the dominant fish in the tank. He is picking apart my Midas cichlid (6 inch) to the point where he doesn't fight back. There is a jack Dempsey (5 inch) in there also who I adopted and don't care much for. Also, I have a nice bleekeri (4 inch) who I would like to keep...IF YOU COULD ONLY HAVE 1 FISH IN THIS TANK WHO WOULD YOU PICK AND WHY! I can't keep them all in the same tank much longer 

