Thanks for the info, Tom. Like you, our pool is very visible from the house which entered into our decision to keep it open for the winter.

Since reading your first post, we've had temps in the 20's overnight, so the freeze protection mechanism kicked in automatically. That's great, but it meant that we had a lot of time running the pump. So, I've been manually turning off the "normal" run times. I guess I need to do some experimenting as well, since it appears I could do just as well with a lot less regularly scheduled pump time in the winter.

Really glad you posted your initial question.