Help with a very neglected wildlife pond
Hi, We have moved to a house with a wildlife pond and knew the path around it was starting to collapse. Now that Autumn has arrived we want to make a start on the path. However, the problem has got much bigger than we thought. The pond was originally constructed approx 15 - 20 years ago, but the previous owners to us have not done anything for about 8 years. Our rear garden slopes and drains into the pond and we live in an area with high rainfall. The pond is elevated and half of its circumference is retained by a mud bank. When the pond has been filling the water level has rising above the level of the pond lining and seeping into the surrounding garden causing the path around the pond to collapse. We started the project by draining the pond in order to repair the path and the retaining walls. We are assuming there are no splits in the original liner. We are now left with very thick brown sludge about 2 foot at the bottom and looking for advice on whether to: empty pond as much as possible and fit new liner on top of old liner; remove original liner and start again. I have attached a video and some images. Any advice greatly appreciated.