I'm setting up a new tank and wonding if Oscars would live peaceful with some labs and peacocks. I've heard aggressive behavior can be reduced when you over stock. Would this be true with a pair of Oscars?
Two Oscars need a pretty large tank all to themselves, and no I would not mix them with labs and peacocks. Overstocking (to the proper level) is a strategy used with the Malawi (labs and peacocks) but not Oscars.