Citrinellus;4400331; said:I'd advise against getting another oscar. I don't know about your area, but people have a hard time finding new homes for large oscars in my area. I say keep the set-up your currently have.
Did you check all the seals on the magnum?
+1. Most LFS's won't take an oscar for free. You might be able to give it away on craigslist for free though.
As for the magnum, is there air stuck in it somewhere?