I live in Michigan and have a Radiant metric GT pool which is installed completely inground. My plan for closing it was to use a skimmer cover and not drop the water level at all, but I have not been able to find a cover that fits. According to Radiant I should drop the water level, just below the skimmer. I don't want to drop it too low, how low should just below, the skimmer be. I will be using a mesh cover on the pool so rain and snow will get in. I'm worried if I drop it too low, it will affect the strucural integrity, but if i leave it too high it may hurt the skimmer. I will also be using a gizmo.