On the old forum someone had a vacation home with pool that they only visited on weekends. Ben's suggestion was to raise CYA significantly, then they could shock before they left it, and Chlorine would drift down during the week...Anybody remember that post?

That's how I lived with my pool for 2 years as the CYA was well over 100 and partial drain was out of the question.

It has finally dropped to 50 naturally with rain, backwash, etc. I liked my pool care better with it higher and I am now carefully raising CYA with pucks.