Apply heat to any part of the pump pipes that may be frozen; the pipes must be thawed before the ice sheet can thaw. Wrap heating pads around any frozen pipes or face a portable space heater next to the plumbing system to warm the pipes and force out the ice.
Turn on the pool pump and run it for up to eight hours per day. Circulating the water helps thaw an ice sheet, and it prevents further freezing.
Empty out three 1-gallon milk jugs. Pour antifreeze into each milk jug, filling it halfway. Tightly seal the milk jugs, then float them into the pool water once the ice sheet is thin enough to break through with your hand.
Add an ice equalizer pillow to the water, which you can purchase at most pool stores. The ice equalizer pillow equalizes any pressure the ice causes to build up in the pool, and prevents damage to the skimmer, tiles and walls.