i recently added a gold gourami to my 20 gallon tank, i have 4 neon tetras 5 platties a peppered cat fish, 1 fancy guppy and 1 angelfish. At first the gourami was shy but then he started nipping at the angelfish's fin damaging it, and causing the angelfish to become very shy. I just got back from a two day trip and found 't one the platties dead and the gourami chasing after the cat fish and again more damage to the angelfish's top fin. At this point i don't know what to do. Please help
thanks
thanks