I don't close my pool during the Winter.
The average Winter high temperature where I live is about 60 degrees. The average low is about 40.
I assume the water temp would not be above 50.
Would it make sense to only test and adjust FC and pH about once a week?
PH is more likely to need adjusting than chlorine as I have a lot of aeration. I have a small waterfall my wife likes to run and a Polaris sweeper that breaks water frequently.
I don't look forward to dipping my arm, past the elbow, in cold water on a cold windy day.