I realize I'm probably over thinking this (or I just need longer arms) But.... I have been coming up with a CYA reading of about 60 and was debating raising it. Instead I said lets do it the right way.
So I received my CYA, CH, and TA reference solutions today. (very fast shipping, Thanks Dave!)
Anyway , just finished doing the CYA test and I'm coming up with 40 on the reference instead of 50. I know my old eyes aren't that good.
Given the narrow parameters with SWG, I'm stuck with thinking if 50 looks like 40 to me, than maybe my pool reading that looks like 60 to me is really 70.
Ohhh.... my head hurts, where is chem geek when I need him ?