Hi there thanks for all the answers. To add more complexity to the issue, I seem to be losing way more water than what would be displaced from the cover. Reason being I lose so much water over the winter that my tarp (which was sitting on top of the water in the fall) completely rips (second tarp in so many years) from the pressure of the snow and where the water is now sitting in the pool. So now I don't have any water on the tarp and my water level is about 2 feet below where I closed the pool.