Quote Originally Posted by BnaRealtor View Post
... 1/4 c pool water and 3/4 distilled water. From that one cup I took a sample and my reading came in at 35(x3)= 105. That's dramatically lower than the "off the charts" I was getting. Did I do that correctly? ...
Bringing bad news - Sorry!
Diluting 1/4C pool water with 3/4C distilled, we need to multiply by 4. The pool water is a quarter of the volume we're testing. The result is CYA = 35(x4) = 140. Sorry.

It's OK to run the pool with CYA that high, just need to keep FC high enough.