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Thread: Menards bleach adding cya??

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    Join Date
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    Menards bleach adding cya??

    My pool had a cya measurement of 20 a week or so ago. I have only been adding menards 12.5% bleach as needed and had (1) 3" chlorine tablet in a floater. Today my cya measures 45. I checked it 3 times just to be sure. What could be going on?

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    cowboycasey's Avatar
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    Re: Menards bleach adding cya??

    Welcome to TFP

    What as the temp of the water when you did the first test, if it was below 70 it could have been off, and that 1 puck added CYA and I bet there was some leftover in the floater...

    Still, 40 CYA is just about perfect...
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    Re: Menards bleach adding cya??

    No sodium hypochlorite would contain cyanuric acid. Most likely just test error.

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    Re: Menards bleach adding cya??

    The water temp was fairly cold. I will check again at a warmer temp.

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    Isaac-1's Avatar
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    Re: Menards bleach adding cya??

    The CYA test is known to be off with cold water samples, but works well when sample is at swim temperature, so if testing a cold pool allow the water sample to warm up.
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