Maintaining Proper Water Levels
When the cover is installed, the water levels should be set around 15” - 18” below the cover. You don’t want the water level too high for safety reasons.
You also don’t want the water level too low because this can put excess stress on the cover. When snow accumulates on the cover it needs to be able to rest on the surface of the water. If the water level is below 18” it can cause structural damage. You can check the water levels by removing a spring in one of the corners. Just pull back the cover to see the water level and use a hose to add some if necessary.
Solid cover owners need to be aware that a significant amount of water can be pumped out of the pool by the automatic pump. When snow or ice weighs the cover down, water that seeps up from the pool can be pumped out by the automatic pump.