Pond Boss Forums POND CONSTRUCTION Soil questions Leaky clay liner

Bentonite will not work on a active spring. Dig out the spring for example 8 foot down antwice the area and use virin clay dug from a clay pot and cover with road fabric and more clay on top. thsi way if it does back drain you can see where it took out the water.

If you go with bentonite the sides are to steep and you should use 30 mesh mixed with sand wash from your local quarry and tilled in 10inches

If you walk out onto the pond bottom is the clay pumping