please someone help me compensate for my stupidity. I really need one, but i'm totally out of money, I don't think a single fx5 is sufficient for a 220 with a single 18 inch aro in it, even if it is the only fish. I need to get another filter working on this sucker, and im not sure if the 404 i got with the tank, which was in saltwater, even works anymore. wat do i do?