halfbloodprincess
Fish Herder
I was wondering if oscars could be in a 75 gallon tank. If they could, could I have 3 bala sharks and 1 oscar in it? Thanks 
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would this be okay?:In a 75 your best off with one oscar. You could do other small fish. If i were to set up a 75 gal with an oscar id have....
6 australian rainbow fish
1 oscar
1 pleco
1 spotted rapheal
As long as you put alot of filtration onto that, it would probably work. Since the rainbow fish are fast, they probably wont get caught by the oscar. You could do other fish maybe like danios instead of rainbow fish. Australians stay fairly small, you wouldnt want anything bigger. Basically if you have enough filtratioin, and you get small peaceful fish that the oscar wont eat, your ok. What is your filtration anyway? I wouldnt put any other smaller cichlids in the tank with an oscar. I'm not too sure about the red tailed shark either.
EDIT: i actually just thought maybe you could put a convict, or a firemouth with the oscar, and use the school of fish as dithers. Keep in mind to keep all those fish together you'd have to over filter the tank to keep up with the bioload. Also, you should have spare tanks to put fish if they start fighting.