Patrick wrote:
Does anyone have any suggestions or experience in placing "something"
under a tank stand to help protect hard wood floors?

How about this. Build a catch basin the same size as the inside of your cabinet.
What it's made of isn't as important as the fact that it's waterproof and can
hold at least 5 gallons of water. Place that on legs about 1" high. The rest of
the stand should be built around this. If I were building a stand, this would
form part of the bottom.

The 1" gap will prevent any water from seeping in between the bottom of the
basin and the floor. Assuming it's the same size as the stand, it's larger than
the tank, and should be able to catch anything serious.

George Patterson
Worry doesn't improve the future; it just ruins the present.