So, my LFS has a BEAUTIFUL Tiger Oscar that has been there for months. He is pushing 3 inches in a 10g tank. I am thinking that when I get my 55g running, which will be in about a month or so, is this sufficient enough tank to rescue him? He is so pretty and I cannot fathom the though of him being in that little tank forever! I really think I want to save him, but 12 inches is a lot of fish. Is 55g adequate? And what can go with him in that size?