I drained and refilled ~60% of my pool. Per my water meter, I used 15.1K gal yesterday which means about 15K went into the pool, or about a 55% refill.
Unfortunately by CYA only dropped to 70 :(.
My CH dropped to 350 :).
I got the pH to 7.2 and then just added 6 gal of bleach. I guess I need...