How to Find A Pond Leak
While some water loss in a water garden is normal due to evaporation
and sometimes splash out, significant loss can be a problem. The first,
and usually most difficult, step in fixing a leak in a pond is to
actually find the leak. Follow these steps to make the job of finding a
pond leak little more efficient.
Step A in Finding a Pond Leak
Turn off the
pump. If the water level continues to drop skip to Step C to continue
the search for your pond leak. If the water level stays the same see
Step B in Finding a Pond Leak
You have now determined that the leak is not in the main basin pond.
Now you need to narrow it down a bit further. The pond leak is either in
the plumbing or in the waterfall / stream. Closely inspect your
plumbing, particularly at any joints, make sure there is no leakage
here. Next, inspect your waterfall and stream for leaks. Most of the
time, the problem is caused by plant matter or other obstructions
raising the water level behind the weir and causing an overflow over the
liner. Perhaps a stone has settled or your pond liner has slipped below
water level in an area. If it hasn't rained in a few days, check around
the perimeter for a wet spot. If you find one, you have a good idea of
where to look closer for the source of the leak. If you still have not
found the problem use the ideas in Step C in the streambed.
Step C in Finding a Pond Leak
At this point,
you have determined that the leak is in the pond itself. Leave the pump
off and allow the pond to continue to leak until it stops. If it does
not stop before reaching a level dangerous to fish and plants, you will
need to temporarily remove them from the pond. While the water level is
dropping check around the edges to make sure that the pond liner has not
sunken down or rocks have not been displaced. When the water reaches
the point where it is no longer dropping it will be necessary to closely
inspect the liner all along this water level to find the source of your
pond's leak. You should be looking for any irregularity in the pond
liner from a large gash or a tiny pinprick. For fast leaks you can try
putting some milk in a squirt bottle and spraying into the water at the
edges of the pond. The milk will cloud the water where there is no hole.
It will flow toward the hole, if there is one. This method will not
work for slow leaks.
Once you have found the source of your pond leak it is time to make
repairs. If it was just a displaced liner, move everything back into
place. If a hole was found in the pond liner, you can patch it following
our Splicing and Patching Instructions.