But before you start building, bear in mind that ponds can ... By far the cheapest way to install a pond is with a liner like this. All you need to do dig a hole, fill it with the liner and ...

To prevent an invasion as you determine how to build a pond, run the liner 12 in. or more beyond the pond’s edging stones and cover it with mulch or gravel. The rubber liner will block water ...

This will help protect the butyl liner being punctured. A layer of pond underlay or old carpet above the sand will provide additional protection. Get a friend to assist in unfolding the butyl liner.

There can be several causes of persistant water loss in a pond, many of which are due to problems at the building stage ... check that no part of the liner has slipped below the water level.