I can't make up my mind on putting an Oscar in my tank. I've had them before and love they're personalities, even though they can be wimps at times. I would be adding him to a established tank(120g) with other CA and SA cichlids of 2 - 3" sizes. They're a robust group so I would add an Oscar at a little larger size, about 3 -4". Just can't make up my mind if the added bioload is worth it. Yeh or neh?