Hi guys, i have a 4 feet tank and i have a couple of cichlids including a firemouth, a tiger Oscar, an albino oscar, electric yellow auratus, stripped auratus, a golden Severum, a Convict cichlid a rainbow Shark, a pleco, 2 apple snails, a green terror, and a yellow parrot. Guys my issue is that the firemouth periodically chases Severum and parrot, but Severum constantly chases parrot and but in his fins. I have a lots of housing places such as a small cave, a small pot, some submerged money plants. What should i do with the Severum. I love them both. Severum is 4" and parrot is 3.5". Firemouth is 3.5". Green terror is 3.4". Test all fishes are 3". Thx