Help please =*(

I just got a new titan eze stand in the mail today for a 40 gallon breeder aquarium. After assembly i found that one of the corners was welded unevenly causing the side bar of one corner to sit 1/8" higher than the front bar of the same corner causing the aquarium to to be unsupported by the front bar. All the other corners look close to perfectly level. Could i fix this problem by running a heavy bead of caulk around the entire top perimeter of the stand and setting 1/2" plywood on top of that to give a flat surface? would it be ok to set my rimmed aquarium on plywood? http://www.drsfostersmith.com/produ...&catargetid=1570169975&cadevice=c&cagpspn=pla