Bob,
I'm not sure if the 4 way testkit DOES test CYA. I know that walmart does sell a kit that does, but I thought it was a 5 way.
I'm sure that someone here will know. Next time I'm there, I'll look.
What does it say it tests? For CYA, it should come with a separate tube with a black dot on the bottom, with a graduated scale on the side for ppm.
Frank D.
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