CYA Levels

[JohnT]

There are some issues with CYA testing that indicate it may not be accurate above 100ppm. Many people have results of the same nature, which tends to indicate high CYA readings may be higher than the test shows.

[hooeld]

Water test this am by pool store:

TC 5 ( I think that is as high as they can read)
FC 5
CC 0
PH 7.6
Alk 120
cal 150
CYA 60

they called for 23.9 lbs Cal hardness increaser..

I plan to drain about 30% of the pool tonight, and try to get the CYA to 40, then address the rest.. I wan the CYA toward the low end, as I have a few Tab's I want to use up, slowly over time, so I want it to be able to raise a bit..

Am I on the right track??