I dont like when people are this blunt without bringing their own experiance or rought facts.cichlid_kid96 said:they will kill each other. i have heard that if u have a 600 gallon tank it is good to put like 6 of them together but no less the large number allows aggression to spread out but i would def not reccomend a buddy because in a few months that buddy will turn into food
Thats why everyone likse the fish guy because he always provides usefull, indepth decriptions and has plenty of experiance.
Anyway, my experiance, i have 2 oscars in a 150gal all fine still, yes they ocassionaly show each other whos boss but no harm is done, they are 9 months old now (around 8-9 icnhes). No idea if they are male or female. I also have 5 giant danios as dithers.
When i brought my 2 oscars they hid for the first 5 hours but i dont know if its because i have 2 but they both came out looking for food together.
BUt like Fish Guy said "What size tank do you have now? You talked of upgrading but from what?"