Should I be worried? I have 3 holes drilled in the bottom of my tank (2 for 3/4" bulkheads and a single 1" bulkhead). My tank is ~50G cube (24"x24"x23.5") made with 1/2" glass, BB and about 40lbs of rock. There is no trim on the tank, and it is a floating bottom style tanks. I don't have foam or plywood under the tank either.
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