I have 6 Discus in with Gouramis, Neons, Mollys, and a couple of Platys, I also had a Betta but he passed on unfortunatly. There has been no inhouse fighting and even the Betta left them alone. Maybe further down the track i will give them there own tank but in the meantime thay are all doing fine and i really cant see why with the right peaceful fish in uncrowded conditions they cant be kept in a community tank.