So i bought a new 55g setup from someone moving away. The tank included alot including a nightmare in my book. It came with 2 adult male zebras, 1 female zebra, a 10" pleco, and a dang jack dempsey. Of course the dempsey is boss of the tank. I would like to get rid of them and have an all male mbuna tank but the significant other wont let me. Is there anything I can do including adding fish to calm down the aggression? What do you all suggest? Im currwntly building a 60g for my oscar I may be able to throw the dempsey in temporarily..