ummm, I don't think anything breeds as fast as an oscar eats...........except those stupid pond snails............ If you want more then 2 fish in a 75 get smaller fish. Or do discus and cardinals. A 75 with one oscar would be fine, but the more fish you add the more the bioload, and oscars are messy fish. I would probably go with 5 firemouths and a good pleco, and a rapheal cat. Hmmmmmm, ideas ideas ideas...................oh no, another tank setup.............
