I started last weekend trying to balance my pool after years of neglect.
Here are my present readings, for what it's worth:
CH 1,100 - Yes I know it's a problem.
This post is about the CYA.
I started with 0 CYA according to my local pool store's test.
I added 4 lb of HTH Stabilizer and Conditioner, Sunday before last. It was dissolved by last Tuesday or Wednesday.
This past weekend it measured 20.
Today it still measures 20.
4 lbs should have brought it up to near 50 by today.
Should I add more? I don't want to fooled by a delayed reaction and wind up with too much.
I was really careful with the black dot test. It's a little subjective, but my wife and I both tested it and came to the same result.