Someone gave me a 12" plus Jardini because it was bullying all his fish (Flowerhorns, big cichlids, etc.) in his 400gal tank. So I housed this "mean" fish with all my bichirs. He doesn't bother them at all. I did have an Asian Aro back a few months with an ATF, and all they did was go after each other, taking scales here and there. I had to separate both of them because I was afraid one of them will die, and it probably will be the Asian. But I didn't want to find out.