I just bought a 37gal rectangular aquarium that's quite tall (2 feet maybe?). The people at the store were quite useless and couldn't give me much guidance as to what kind of equipment I will need. We bought an over-the-side filter, but were later told by a friend that because of how tall the tank is, we need an air pump & stone as well. Upon returning to the store, we were told that this is incorrect. I'm not quite sure what to believe because no one seems quite sure of what they're talking about! Can anyone help?!