In any system with water, pipes, liners and rocks, leaks can – and do – develop. Finding those leaks can be tricky, but there are some steps you can take to help narrow down the problem area.
David had a beautiful backyard pond installed about six years ago. Early in the spring, a large section of the wall near the patio collapsed into the pond. The dirt under the exposed liner that you see on the left felt spongy, and obviously wasn't holding a shape.