Ahhh...hardwood floors, huh? Living dangerously, I guess, aren't you? Well, I may be messier than others, but I doubt it. So, I'm not sure what, but I'd recommend that you put something down between the tank-stand and the nice flooring you'll have in the room. Just getting saltwater on the hardwood floors and not drying it perfectly, which is largely impossible because some would get between the stand and the floor under it, will lead to a fairly quick degeneration of the finish on the wood...even if it's got a good coat of polyurethane on it.