Im trying to get as much oxygen into my tank as possible. In short what I know is that any agitation at the surface of the water is what creates the oxygen in the tank right? I have seen some big tanks with a long stick like piece at the bottom that shoots out massive amounts of air bubbles...thats whats on my mind now (is it good for this purpose), but what other ways can I increase my oxygen in tank for really cheap. Other wise I could just add another powerhead or something to agitate the surface?