King of the tank, Red Devil, then a Texan, then a Flower Horn the most aggressive in the tank, then Jack Demsey, then a male Kenyi, then the female Black Convict, then Pink, Yellow Lab, Hap, smaller Flower Horn, Kenyi's, and down the line, I run my water at a PH of 8.0, that seem to suit all, I filter 1300 GPH and have 3700 GPH of water movement and am running a temp of 80 right now due to Convict eggs, normal 78, and have never lost a fish to water conditions and all seem to have very little stress, you may be right Convict, but time will tell, as of now I have not seen any problems now that pecking order has been set and all fish seem happy, Im running 3 tanks, 150, 46, and a 10 for fry and all tanks are doing great........