Step 3: Check your pond liner and mechanical pond skimmer connection.
With the pump off, fill your pond to your normal and desired level.
Mark the water level with a coin. Set the coin on a rock just below the water level – if the water drops below the coin, it will be dry, if not, it is shiny enough you can see it and the water above it.
Keep the pump off for 12-24 hours, then take a second reading.
If your pond remains full with no water loss then:
a. Your pond liner is ok.
b. If you have a mechanical pond skimmer installed then the sealed connection is water tight and ok.