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Thread: Question about CYA

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    Question about CYA

    This may be a very stupid question...but...

    Is it possible to have CYA in your water if you have not added any yet? I.E. is there a naturally occuring chemical process that creates some on its own?
    18' x 48" Round AGP. Intex 2650 Sand Filter/Pump. Intex SWG

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    Mod Squad jblizzle's Avatar
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    Re: Question about CYA

    No and No.

    Did a pool store tell you that there was some in your pool when you have not added any? That is not uncommon.

    But, remember, if you have used dichlor or trichlor, then you have added some.
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    JasonLion's Avatar
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    Re: Question about CYA

    No, the only even remotely common source of CYA is pool chemicals. Several pool chemicals contain CYA, for example trichlor tablets contain CYA. But it doesn't occur naturally. I suppose it is remotely possible for someone to use trichlor tablets as part of a well water sanitation system, but that would be extremely unusual.

    Why do you think there is already CYA in the water?
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    Re: Question about CYA

    No, rather it was the opposite. I went in to a pool store and was looking at the CYA products and the guy asked me about my pool. I explained it's a few days old with fresh water, etc. and his response was "how do you know you even need CYA if you haven't tested your water yet?"

    Basically, I just wanted to make sure I was having the correct thought process before running a test that I didn't need to do yet.

    Appreciate the help.
    18' x 48" Round AGP. Intex 2650 Sand Filter/Pump. Intex SWG

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    Re: Question about CYA

    Pool stores don't get it. The guy probably thought CYA was chlorine or something.
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    JasonLion's Avatar
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    Re: Question about CYA

    Actually, it sound alike a question we would ask about PH or TA or CH
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    Re: Question about CYA

    will CYA hurt the vinyl liner if left undissolved on the liner?
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    Re: Question about CYA

    Quote Originally Posted by Cobo351
    will CYA hurt the vinyl liner if left undissolved on the liner?
    Well, you do not want any chemical to sit on the liner. Best to vac it up and let the filter capture it.
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