We just had warm weather here in Ontario, Canada followed by rain. I decided to look at the water level and the pool is frozen to the cooping. It's raining again, and tonight we are going back to a deep freeze. Do I need to do anything? This is my first year with a pool, and I'm worried that with the added rain when it freezes, the cooping will get lifted. It's a liner pool, not sure if that makes a difference.