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Thread: black dot still visible in CYA test

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    black dot still visible in CYA test

    Please do not hijack another member's thread! Always start your own thread, even if the situation is similar. Butterfly



    opened the pool today, checked cya. the tube filled to the top and the black dot was still very visable so its less than 20, should i use chlorine tabs to get it to rise
    19500 gal, IG, haywood s-200 sand filter & pump, 3/4 horse single speed motor, vinyl liner, tf 100 test kit, installed early 80's, Terre haute,In

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    Re: Any tricks to measuring CYA?

    should i use chlorine tabs to get it to rise
    The short answer is no.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: black dot still visible in CYA test

    If you want to raise your CYA, I would follow the pool calculator and add either solid stabilizer or liquid stabilizer (based on your current and target numbers).
    Keep in mind that it can take solid stabilizer up to a week to dissolve. It will also lower your pH.

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    Re: black dot still visible in CYA test

    ok thanks, will follow the pool calculator target levels
    19500 gal, IG, haywood s-200 sand filter & pump, 3/4 horse single speed motor, vinyl liner, tf 100 test kit, installed early 80's, Terre haute,In

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    Re: black dot still visible in CYA test

    any thoughts on solid stabilizer vs. liquid
    19500 gal, IG, haywood s-200 sand filter & pump, 3/4 horse single speed motor, vinyl liner, tf 100 test kit, installed early 80's, Terre haute,In

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    Re: black dot still visible in CYA test

    Quote Originally Posted by REBARBEE
    any thoughts on solid stabilizer vs. liquid
    Granular/solid CYA (a/k/a stabilizer or conditioner) is the most common. Lots of us buy it at Walmart. It can take up to a week for it to appear on the test, however, 24 hours after it has dissolved from the sock we 'assume' it is mixed in the water and adjust chlorine levels accordingly.

    The liquid CYA is pricy and it is instant.
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    Re: black dot still visible in CYA test

    thanks will probaly use the solid just because i can get it local, would have to order the liquid
    19500 gal, IG, haywood s-200 sand filter & pump, 3/4 horse single speed motor, vinyl liner, tf 100 test kit, installed early 80's, Terre haute,In

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    Re: black dot still visible in CYA test

    the directions say to pour the stabilizer (granular) slowly into the skimmer but i'v seen on here that the sock method is best . is that what you recommend
    19500 gal, IG, haywood s-200 sand filter & pump, 3/4 horse single speed motor, vinyl liner, tf 100 test kit, installed early 80's, Terre haute,In

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    Re: black dot still visible in CYA test

    Either way is fine. Without the sock, you should wait about a week before you backwash.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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