What is that? Quarter inch? I'd shim it if it's more then even 1/8 max but that's just me... plus all my tanks are used/old so I dont take chances on that.. lot of pressure with water
Hello; Yes to this. out of level on the long side or on the short side not a big worry for me if not too much. Out of level corner to corner is the worry. That would torque a rectangular box. Good point.Must avoid situations where the tank base is torqued or twisted.