I was surfing around on-line and found a guy that had set up a 2000 gallon aquarium in his basement. While it'd be *really* cool to have such a tank, I can't help but think what a pain in the butt that thing would be to maintain (I do a 1/3 water change on my 55 gal every week; a similar water change would involve nearly 700 gal of fresh water on a 2000 gal tank!). What kind of maintenance would be required on a tank this size?