All good info. My idea today was to put my leaf net on the pool for the next 3 weeks, until close. Not sure if wet leaves laying on the net will cause any bits of algae, so I'll definitely do my OCLT a few days ahead of close, in case correction is needed. And I vacuum on closing day.We have ALL the patience in the world for folks genuinely trying to lean. Make us pause/rewind ANYTIME.
Even a few days before close is fine, providing you are sure your FC was well above minimum between A and B.
Loss is loss, whether you lose 2 ppm at 12 FC or 5 FC. You're just taking the UV from the sun out of the equation. If you lose FC overnight, it's organic. (Algae).
Then the rec is to close at half SLAM when using algecide. They consume each other leaving you with less of each so you don't want to eat up too much of the algecide. Ensure it's polyquat60 so it's copper free.
Last year for close, I did the full slam amount, and whole bottle of polyquat, even tho the dose should have been about half bottle for my water volume. So the extra polyquat was probably good, in that, if chlorine ate up some of it, there was sufficient polyquat left to do it's job. My water this spring was crystal clear.
Doing half the slam amount at close makes me a bit nervous.