I am upgrading to a 75 gallon aquarium soon and I want to add an African brown knifefish and a leopard climbing perch (aka leopard bushfish or African spotted leaf fish). My concern is I also have a 5 inch snakeskin gourami going into the 75 gallon and I know they can be aggressive especially towards their own species. The African spotted leaf fish is somewhat similar to a gourami in shape and will mostly likely be 2 inches or smaller. So do you think they can live together peacefully or at least with minimal aggression (By this I mean a small amount of aggression that will not be harmful). Also I believe the knife fish will get along with both of them but if anyone disagrees please speak up. I just want to be as sure as possible that all these fish will get along. Any advice is appreciated.