Today I noticed a couple of guys closing my backyard neighbor's pool. I'm not sure if they have a company as they were dressed kind of bummy. Since they have a similar pool to ours and we've only lived here a couple of years I decided to watch. I missed the start and from my vantage point there is a lot that I can't see, but I noticed that they did things differently from what I was taught (both from reading online and at the pool shop seminar I attended once).
First, they only dropped the water level a few inches (backwash perhaps?), not the 6" below the skimmer that I was told. Then they inserted stoppers into the returns and tightened with a wrench - they were still below the water line. Also they did not remove the lights and weight them down. I saw what looked like a yellow blower. I'm guessing that maybe they sucked up the water from the pump end? Not sure if they blew from the skimmer.
I can't see the skimmer, but I could see them poor 2-3 bottles of chemicals near the skimmer but not sure what they were. Aside from the gizmo it looked like they temporarily put in a gadget that I've never seen - it was a white corrugated pipe with a weight or ball of some sort on one end, possibly 3-4 ft long. What is that?
We've only had our house for a couple of years so I can't comment much on how much water accumulates. Last year there wasn't much accumulation, the previous year it was top of the skimmer. Our winters often dip below 0F.
Does this method of pool closing sound ok? I'm wondering if we are needlessly dropping our water level??