Like many others I too am very frustrated with the CYA test. I feel like I am improving but to be sure I ordered the Standard to compare. I can still see the dot!!! I thought it should completely disappear!
Comparing the 50 ppm standard to my pool water tube I am measuring 80 ppm with my pool water. However I feel comfortable saying that with my pool water tube the dot pretty much disappears closer to 60. I know responses with say to go with the standard but why can I still see the dot. Its a bright sunny day.... back to sun... tube at waist level. And yes I have poured and repoured. If I move to more shade the dot is even more evident.
I would love to believe my stabilizer is at 80 because that would be perfect for my swg. But if it's 60 I need to add some. If I'm wrong and it's really 80 then it will be too high! What do I do?