that would be better in my opinion. It's Just, I know how much carpet costs and the other problems that can occur from molds and mildews in the house. Especially if there are children present.
Another option, I just thought about, I have seen 55 gal tanks sitting on small bricks only on the corners. That would give the carpet air so it could dry out if you have a small spill.
hope I have been of some help
Duane