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Thread: How much time to read pH and CYA tests

  1. Back To Top    #1

    Join Date
    Jun 2011
    Long Beach, CA

    How much time to read pH and CYA tests

    How much time do I have to read the pH and CYA tests after they have been mixed? Also, will CYA read higher with 90 degree water compared to 70 degree water? Thanks!
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  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: How much time to read pH and CYA tests

    The PH test should be read immediately. The color will often shift if you leave it sitting for a few minutes. The CYA test is good for perhaps ten minutes after mixing, especially if you shake it up a bit right before reading.

    The CYA test is not affected by high temperatures (within reason). Low temperatures can slow down the chemical reaction, so it doesn't complete, leading to less cloudiness than there ought to be. But anything around 70 or above should allow the reaction to run to completion and give the same results.
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