I was think about your putting a tank on hardwood. I think I would get some rubber flooring and put down under your tank and stand, extending out a couple feet (at least) in each direction (or however far out as possible that still looks decent). Then use some sort of decorative rug to cover and hide it. Cut the rug out where your stand will sit (so cut out a rectangle the exact size of your base) so it looks like the tank is sitting on it, but so you can easily remove and clean or let dry out WHEN needed. Itll also act to soak any spills preventing them from reaching the wood, hopefully. I usually get more water surrounding the tank on floor, than under the tank itself... And would have probably ruined any hardwood under/near my tank if there were any by now.
** quick addition - I covered my little fish room area with a rubber flooring I found at Menards.. It's 1/4" or 3/8" thick and came in 3' wide x 6' (ish) roles. It's like thin workout weight room flooring.
... or you could just put down vinyl (without actually gluing it down). Make a frame with well sealed wood trim (matching your hardwood) to staple it to (from underneath), then silicone the edge where the vinal meets the wood, which would add a small lip to hold in small amounts of water.