Proper planning ensures a long-lasting pond. Start by marking the outline, checking for roots and sharp rocks, and creating a smooth sub-base with sand or underlay. When you unroll the liner, allow it to relax and conform to the shape before trimming. Position Pond liner clark rubber at the pondβs lowest point and drape it evenly up the sides, leaving generous overlap. Secure edges with stones or coping and backfill carefully. Finish by slowly filling with water, smoothing wrinkles as it fills for a professional, durable result.