What the ?? we were told we needed 12x12 patio blocks for under our uprights on our buttress free oval. So how do we install those so they don't heave with frost? We live almost on the Canadian border and get very extreme winters. The whole area (Red River Valley) is notorious for frost heaves.

This pool claims it has more uprights and "oversized base plates for stability" Do we put our blocks under just the base plates or ??? If we don't need those blocks, I am bringing them back.