The problem is the top is covered with a thick layer of ice and I can't see
the liner below.

"Sam Hopkins" wrote in message
.. .
Whereever the water level stops is where your leak is.

"Dan" wrote in message
...
My 1800 gallon 4.5 foot deep pond is losing water. I'm in zone 5 north
of
Detroit, temps. have been under 20 degrees for almost 3 weeks. Top is
frozen solid with opening for gas exchange created by air pump and
external
water pump flowing in. Water level is dropping to over one foot below
ice
level. I refill every day and it still drops. No evidence of any
leaks.
Any ideas? Thanks, Dan