PipeDown wrote:

1" from a 12' x 24' pool in 10 hours seems like a pretty good leak???

Thats 12x24 = 288 square feet 1" deep is 24 cubic feet or 2.4 CF per
hour or (1 US gallon = 0.133680556 cubic feet)...

= 2.4/0.12268 = 18 gallons per hour or 0.3 gpm...

Note that the rate of draining will decrease as you remove water and all
that weight is no longer pressing on the hole. 2.4CF/hr will be cut in half
when the pool is half empty if the hole is on the bottom.

The leak rate might increase, with less pressure
to seal the liner to the soil around the hole.

Nick