Quote Originally Posted by mpoulin View Post
Each time this happened to me my pool was already full of water.
Yes, I've seen that happen, too. But "full of water" usually doesn't mean "full to overflowing", but rather 'at the proper level'. Unfortunately, this usually means 6 - 12" below deck level.

The water level in the pool needs to be HIGHER than the water level in the ground, or rather, higher than the hydrostatic pressure of the water around the pool. It's possible for water pressure UNDER the concrete deck to be higher than the deck, if water is flowing under the deck, along grade lines.

But, the odds are, you can stop the liner from floating, if you keep the pool 'full to over flowing' during periods when the ground is saturated. This won't damage most pools, but will unfortunately prevent the skimmer from operating properly.