Ok here we go. I had a CYA of around 180 & just finished partial drain and refill. I tested water with K-2006 then took water to pool store for test to compare results.
Pool store results
Cya (said they couldnt test it because ph and ta were out of wack)
Pool store says add 9 qts 14 ozs of muratic acid. 17lbs 8ozs of calcium plus.
Pool calculator says 55ozs of acid and 625 ozs of calcium plus 39lbs..
20000 gallon in ground vinyl
hayward super 2 - 1 hp pump