I got a second oscar today and her name is Dolphin. I was planning on getting a girlfriend for my oscar for a long time now . I had to put her right in with my oscar without waiting because I didn't have an extra tank that was big enough to quarintine her. I put an egg crate divider in because my oscar is very aggresive. My oscar has been smashing into the divider A LOT. He also was shoveling sand with his mouth. How long should I leave the divider in.