Re: Brown pool
You need a Taylor K-2006, the Trutest is a toy. NOT worth the money it costs (then again, no strip reader is worth the money it costs).
If you don't believe me you might want to read the reviews of it by customers on Amazon. One in particular was interesting where they water was retested 5 times in a short period and the pH varied between 7.0 and 8.1 and the alkalinity between 95 and 185 ppm. In other words, the test results are worthless.
Retired pool store and commercial pool maintenance guy.
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