More water depth for free? I think EVERYONE on Pond Boss would take that deal!
Is he still digging in good clay? You might check in the deepest couple of spots and confirm that you have not reached a sand or gravel layer.
There is some debate on Pond Boss, but I think aerating in summer from the deepest part of the pond results in a higher average pond temperature. Maybe aerate from 12' deep? Or the depth of your deepest structure? That way, your pond stays cooler, but the fish located on or near the deepest structure will be in the column of aerated water.
