text: how do i find a leak in my pond liner? our ornamental pond has a leak in the liner, but i have no idea of how to find the actual leak.  any ideas out there? this can be very difficult! however, when i had the problem i allowed the water to leak away until it stabilised at one level, then with care i applied a scrubbing brush at water level to clean the liner and left it to dry.   next i cut two inch widths of liner (in my case from left over stuff from when i'd originally installed the liner) and using a glue provided by the pond shop, i stuck this on all the way round at water level, leaving no gaps and smearing glue along both edges of the fitted strips. it took a long time and a lot of patience, but it worked.  final tip: lie on planks laid across the pond as you do this work!