The one I think is the male is in a 150g community with a male HRP, female aureus, female GT, 2 male rotkeil and a male terquoise severum. He's the smallest out of all of them but he holds his own just fine. Him and the female GT are the only 2 that spar from time to time. The other is in a 37 tall and is with 3 Cory cats and 8 black and white skirt tetras. She nips the tetras fins a but hasn't killed any... yet. I figured I'd start with a divided tank and see how they interact with each other. The way thier 2 tanks are set up now they can see each other and they don't flare at each other or anything now. The "female" has dug a corner closest to the 150 though