My pond suddenly began to lose 500 gallons over a very short time. Luckily for me, the level stabilized about 8 inches below the normal high point. I enlisted a friend to help me (my titanium knee makes it hard to squat in those positions too long) I quickly found the leak : a former repair job had lost it's patch. The liner was pierced several years ago by a nutria. I managed to find a repair kit at a local fish store and now i am back to normal. (my pond, that is)
John
John