BlackShark11k;3887518; said:Oscars aren't very aggressive, assuming their females, and with enough filtration they'll do fine in a 90...
It is impossible to sex oscars. And proven gender oscars are much more expensive than they need to be. A 90g is useless for them, they need the width much more than the height, so if you are getting a 90g, why not just get a 75g? I say at least a 125-150g with a huge sump