Pond water loss is commonly caused by evaporation, splashing, low liner edges, plumbing leaks, or damaged pond liner. Some water loss is normal, but sudden or excessive water loss may indicate a leak.
Common causes of pond water loss
- Evaporation: Hot weather, wind, low humidity, and moving water increase evaporation.
- Low liner edges: Water escapes where pond, stream, or waterfall edges have settled.
- Waterfall splashing: Water splashes or flows outside the lined area.
- Obstructed water flow: Rocks, plants, or debris redirect water over the edges.
- Plumbing leaks: Damaged pipes, loose fittings, or connections allow water to escape.
- Liner damage: Holes or tears allow water to leak into the surrounding ground.
- Skimmer leaks: Damaged seals or improperly sealed connections allow water to escape.
How do I determine where my pond is losing water?
- Check the pond, stream, and waterfall edges for wet areas or escaping water.
- Inspect accessible plumbing connections for leaks.
- Check the waterfall for excessive splashing or redirected water.
- Turn off the pump and monitor the pond water level for 24 hours, maintaining adequate water depth and aeration for fish.
Pump-off test results:
- Water continues dropping: The leak may be in the pond liner, skimmer, or another area connected to the pond.
- Water level remains stable: The leak is more likely associated with the waterfall, stream, or plumbing used when the pump is running.
For additional troubleshooting, see Aquascape's guide to finding and fixing pond leaks.