Subfloor: The sheet of Wooden (normally plywood) that is nailed to the highest of the floor joists to form the ground by itself right before carpeting or tile etcetera. Now if one of several four corners of your aquarium stand is decreased or better than one other 3 corners then https://marcofdmrr.tinyblogging.com/details-fiction-and-aquarium-setup-tips-81208208