So my pool was closed last week and I had told my pool guy about noticing that my pool dropped in August about 1 1/2 inches a week. It was still happening even after draining my pool below the skimmer and jets. He pretty much said it could either be the main drain or behind the light. He wasn't completely convinced of the evaporation process which surprised me a bit considering how much i've read up on evaporation and pools around this time of year. The liner is new and was put in last year. So I checked today and in a week it dropped just 1/2 an inch. Clearly nothing close to what it was doing when it was uncovered (1 1/2 inches), which leads me to believe that i was dealing with mostly evaporation (for at least an inch of it). I guess my general question is, will my mesh green safety pool cover still create 1/2 inch of evaporation in New England this time of year? I have a call in to my pool guy, but I was curious. If it is something, I would want to deal with it prior to the cold weather setting in. Does 1/2 an inch warrant hiring someone to come down and scuba dive to check the areas still under water like the light and main drain?