Just chekin cause I am setting a tank and planning to move 2 kels and 2 oscars into it. Maybe 3 oscars. 4 Oscars are growing up and not sure if they work out together. Tank I am getting is 60 X 32H X 24. It's going to be cramped but it's all the room I have. I don't have the luxury of a basement or garage "fish room". I am wondering how big the fish will get. They are growing pretty fast and I am doing frequent water changes.Full grown at 16-18”