gouramis tank

http://i.imgur.com/OkG7yBF.jpg   so i had a coworker who knew nothing about fish and he got a 90 gal fishtank from his daughter along with her other fish. i took a 3 spotted gourami from him because it had fungus and one of his feelers was bit off because..... HE KEPT THE FISH WITH A LARGE MOUTH...