not all Oscars will just eat their tank mates,mine actually doesn't eat any of the smaller cichlids at all,its a good thing to be honest,I have a 2 inch convict,3 inch firemouth,3 in half inch texas,3 inch salvini that he can easily eat with no issues.I say mix it up though,don't go with two oscars honestly.Go with a jack dempsey,green terror,salvini,or a texas.