Trust me, ATM the oscar (12'') is the alpha. The oscar was never intended to be there but his size and prior aggro so for now he's doing ok.Aggreed on the major pairing of Pc.I have already removed my sml. female loisellie and possible sml. mota male. Everything else will be monitored and adjusted as needed. will post pics once its stocked. But don't get derailed my main thing was and is to start and maint. a parachromis community. Looking into a larger tanks