Diagnosing a Pond Leak

Have you noticed the level of your pond is much lower than it should be?  Are you having to add water several times a week?  You might have a leak.  There are two basic areas that your leak could be in, the pond or the waterfall.  To figure out where your leak is, follow the instructions below.

Pond Leak

  • Turn off the waterfall for the day or 24 hours (Healthy fish will be ok for this short period of time)
    • Fill  the pond to its normal full level.
    • Measure the level of the water in the pond.
    • Check the water level at the end of the day or the next morning.
  • If the water does go down, let it continue to recede until it stops.  
    • The level that it stops at is where the leak is!
    • Check the sides of the pond at that level for where the liner may be pushed down by rocks or plants.
    • Pull up liner if needed

 

  • If the water level didn’t go down at all, the leak is in the waterfall not the pond.
    • Check the sides of the waterfall for places where the liner may be pushed down by rocks or plants.
    • Pull up liner if needed
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Leak in  pondless waterfall

  • Turn off the pump for the day or 24 hours 
    • Fill the reservoir with water.
    • Mark the level of the water in the reservoir. 
    • Check the water level at the end of the day or the next morning.
  • If the water does go down, let it continue to recede until it stops.  
    • The level that it stops at is where the leak (or leaks) are!
    • If the water is leaking form the reservoir, it will need to be relined.
    • If the water is not leaking from the reservoir, the leak is likely in the waterfall section. 
    • Check the sides of the waterfall for places where the liner may be pushed down by rocks or plants.
    • Pull up liner if needed