What should you do if your pool water freezes?

If you have an in ground pool, in freezing weather, make sure you leave your on pump constantly to circulate the water, if not you could have damage to your pump, and breaking water pipes. The water might freeze on top of the pool, but underneath the water should still be circulating, if not find something to break the ice on top. Freezing pool water is normal. Unfortunately, dented sides and losing sand are not. You probably have a leak that is squirting the sand out, and sucking in the sides. or the cove failed. Either way, if it was professionally installed, they screwed up. I heard that if you filled about 5-6 liter bottles half way with sand and placed in your pool, the pool water would not freeze due to the bottles floating around and constantly breaking up the water so as not to freeze.