It should be where you can see it, in a sunny area, and away from overhanging trees. Hard liners are available in various shapes with built-in ledges, or flexible liners may be used and molded to any size and shape. Steps in Construction 1. Dig the hole. In using a hard liner, turn it upside down and trace the shape.
Sand is helpful in filling up gaps.
With flexible liners, take care to remove sharp objects, and put wet sand or a few layers of newspaper over sharp surfaces. Stretch the flexible liner over the hole and anchor with evenly distributed heavy bricks or stones. Begin running water. This will push the liner down into the hole. Take care that the anchoring stones do not fall into the pond at this stage.