Yeah, we’re all scratching our heads because to the best of our knowledge we DID follow TFP protocols... water at shock level for 3 days ahead of close with FC holding... CYA was between 40-50... We fought high TA all season, but I believe it was 90ish at close... (again, unless something was put in that we didn’t see)... we closed late... opening early is the one we may not have gotten right because of all the rain and cool weather this spring... I would be surprised if our water is much above 60... yet clearly something went terribly wrong...You have an autocover. So, the water should not have been that low in the first place.
With a solid cover, the water should be clean and clear when you open if it was closed correctly.
Autocover is great, but slightly bows at the lip...creating that little gap... we keep two sump pumps on it during winter and rains to try to limit bowing from water weight...
As for the autocover and water depth at close—pool is drained just below the returns... you’re saying that is not necessary for winter?