my first were two mollies in a 2 gallon way back when i was a wee snapper. not sure if that counts, so when i got my 30 gal i had 2 gourammis, 5 tiger barbs and 2 rainbow sharks. the gourammis died within 3 days as the tank wasn't cycled correctly. if only new that at the time. at present i have a mixed African tank.