Help - pond is leaking!
Our 4m x 2m (1.5m deep) wild-life pond has had a small leak for a few years now, so is always 10-12cm below full. We never managed to find where the leak was so learned to live with it, but recently the level has dropped to about 30cm from full -despite all the rain -I think this must be due to the local heron who has been visiting lately! How do we find the leak ? How do we repair the butyl liner? And how do we do all this without disturbing the wildlife (tadpoles, minnows, great diving beetles, dragonfly larvae, etc., etc.). The pond was installed by a professional but he has since retired and his business no longer exists.