My tank currently houses 1 Male Gold Gourami(Lil Guy), 1 Male Bolivian Ram(Rex), 1 Female Bolivian Ram(Holy)4 Male Guppies(Gump, Sunshine, Scissor, Bullet), 1 Glass Fish(The Glass Brothers), 1 Red Platy(Firefly) and 1 Male Cockatoo(Apistogramma) Cichlid(Jimi Hendrix). I might be adding a Female Bolivian Ram to the mix for Rex to have an active playmate and the tank size might be updated to a 20 gallon (40L) or higher. The fish would probably like more room to swim, wouldn't you? They all get along great by the way, which is best of course.