Hi I have a 55 gallon planted tank with 1 baby black gost knife, 1 rainbow shark and 1 african leaf fish. I know the gost knife will likely out grow my tank in 2-3 years but for now it’s find and I will rehome it when it does. Other then that my tank always looks empty and I was wondering if it is a good idea to add 3 pearl Gourami to add some life / movement to the tank. I wanted 2 females and 1 male. I was just wondering if all the fish would be compatible in my tank / would I be over stocking the tank.