This is probably a dumb question, but I'm going to ask anyway. Sort of a multi-part question.
After lowering the main pool water level, do you lower the water level in the skimmers or just put in a Gizmo (or similar) and forget about it all winter? (I live in North AL -- I'm concerned with water in the skimmer freezing, but not the deeper pipes. Shallow frost line.) Best I can tell, the top of the Gizmo will be below the top of the water in the skimmer if I don't lower the skimmer water level. The Gizmo screws into the very bottom of the skimmer, and I'm guessing my skimmer is 14-16" deep at that point. The other option would be to use a 2-liter bottle partially filled with sand, and I think I could sit it on the "ledge" that coincides with where the top of the skimmer baskets normally are. Not sure there's enough room on that ledge though.
I know this isn't that difficult! I'm just overly concerned since this is my first pool and my first pool closing.