could always turn it upside down and make a bottomless tank. I havent heard to much about them or researched them but heres a link http://www.reeflounge.com/showthread.php?t=28454 or just google bottomless tank.
F YEA!!!!! Thats how I will do it!!! I have four massive pumps and a spare old Diesel generator> The tank will be mostly covered and if i keep my panes conditioned regularly it should last quite a few years right? I will try to make up a rough sketch just to give the idea of it. It can be done And i'm doin it !!! Thank you ECL Your a life saver haha