Ok, this is my first year closing an in ground pool. I think I understand the chemical requirements, my questions are around the plumbing. First, the pools is a 18x36 vinyl liner in ground with steps. I have one skimmer, and a wall suction line, no main drain, and 2 returns. From what I have been reading I need to drain the pool below the returns. That part make sense, but what do I do with the wall suction port? If I drain to that I will not have much water in my shallow end and I am concerned that will cause issues with the liner.
Also, do I need to "blow out" the sand filter after opening the drain plug, or is the drain plug sufficient? Also I suspect I should remove both the pump and SWG cell and store indoors for the winter? Also I am located in Michigan, so we get plenty of cold and snow here in the winter.