My male Firemouth is terrorizing my Male Con. He won't let the con eat. He claimed most of the tank for himself(exept for a puny arch under the castle). He won't let him claim a territory. All my con does is stay by the heater in fear that the FM will attack him. The FM will chase him wenever he feels like it. And getting ride of the fish is no option. What should i do? Dithers? Divide the tank? Move the FM into a 2.5 until the con gets a little bigger and More confident?