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The flower horn, as time goes by and it grows more and matures could end up beating the oscar. Let's hope that doesn't happen. To house both as adults you'll need at least a 100 gallon tank. How big are they now and how big is the tank?
I have Oscars, of course, and they are the best fish ever.
Such great personalitys.
I hope you have a 100 gallon tank like TCTFish said because those fish will get huge.
oldshell4481,
A 55 gallon tank is to small for two adult oscars.
Im sure youu know this I just thought I'de give you a heads up.
You too will need a 90-100 gal. tank for two adult oscars.