Can somebody please tell me what the rule is when wanting to extend your existing Pond by overlapping a new liner over the existing one? Am I only allowed to extend it just enough to where the existing liner allows me to create a berm above the waterline? And how do you adhere a new liner to an existing one? And what if the existing liner is 45mil epdm and the new one is that poly type liner from Home Depot? Can those two liners be bonded together? And how would you do it if the existing liner is crinkled from variations in the shelving and elevations of the pond itself? Id totally appreciate your guidance. Peace to you all