Q: Some of my waterfall rocks shifted over the winter, and I think I may have a leak. How do I find and fix it?
Vicky – Roslyn, PA
A: With a winter of ice, snow, and thaw on repeat, your pond landscape likely took a hit. Periods of ice, snow and even heavy bouts of rain can shift rocks and soil, cause erosion and move or puncture your liner, resulting in leaks.
So how to find and fix that possible leak? You’ll need to do some investigating to determine where the problem is and then get busy making repairs. Here’s what we suggest.
Steady the Rocks
Because the rocks shifted over the winter, the first thing to do is return them to their original position them and lock them into place. As you move the rocks back, check to see if they tore the liner or shifted it out of place. If so, patch the hole and tuck the liner back in. Use PondBuild ‘N Foam to fill in gaps between the rocks, support them and prevent them from moving again next winter.
Rule Out Evaporation
What has the weather been like? When the humidity levels are low and the air contains little moisture, the dry atmosphere will act like a sponge, increasing evaporation rates and absorbing the water from your pond. It can cause your pond to lose up to an inch of water a day. To rule out evaporation, fill the pond back up and keep an eye on the water level. Any more than an inch or so of water loss could indicate a leak.
Check for Damp Spots
If more than an inch or so of water is disappearing daily, one clear clue that could lead to your leak is a damp area around the pond’s perimeter. That water has to go somewhere, and a low-lying patch of wet ground is a great place to start looking for its source. Walk around the pond and carefully inspect the soil for signs of unexplained moisture.
Rule Out the Liner
If you’ve ruled out evaporation and found no damp areas, there are two more possible leak culprits: your waterfall or your liner. Shut down waterfall pump and wait for several hours. If the pond’s water level stays the same, then you’ll know the leak is not in the liner itself. It’s likely in the waterfall or plumbing. Check your waterfall box and skimmer for cracks or if the liner isn’t attached, and inspect your plumbing for loose connections.
Track, Repair Liner Leak
At this point, the bad news is that you probably have a hole in your liner, and finding it won’t be easy. But the good news is that it is possible to track it down and repair it. To find it, use The Pond Guy® Pond Shade or some milk to visually track the leak. Simply add a few drops on the side and watch it as it finds its way to the leak. This will take some time, a few attempts — and patience. You can also let the water slowly go down. (Depending how low it goes, you may need to temporarily relocate your fish.) The water level should stabilize, which will allow you to visually inspect the first few inches of liner above the water surface for the hole.
Once you’ve found the hole, patch it up with an EPDM Liner Patch Kit or use some Gold Label Pond Sealer. The 6-inch liner patch is easy to use on small punctures: Just peel off the protective film and press onto the liner. The sealer can be used in wet or dry conditions and will seal completely in 48 hours.
Good luck tracking down that leak and repairing it!
Pond Talk: Tell us about your most mysterious pond leak. How did you find it and repair it?