There are some really nice and easy projects I can turn you too on RC. But like you said, you have to have the stand completely level. If not level the seams on the aquarium will give, then youll be in a world of ****. (I went through that)
After that incident I cut out the carpet. Got Durock from HD and tiled the section where the aquarium stands. Looks good and is safe. Its easier to do than people think and quick too. It can all be done in time for afternoon BBQ & Beer.
This
thread is a good example of a well planned system. This guy used a metal stand and utilizing strong magnets to keep the front and sides in place. Awesome cause after pulling off the front and sides you have great access to your system. The choice of finishes are endless.
If you need help with tiling, just let me know....