So Ive built furniture before and decided to build a stand instead of buying one. The stand looks great and is level, and everything was good so I glued the top piece of plywood on. Then a couple hours later I put the aquarium on and one corner of the tank sits above the plywood by maybe 1/32". Just barely enough to make it rock if I push down on that corner. Is there anything I can do to fix this? Its only a 20 gallon long for my permanent quarantine tank.