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Thread: First Set of Numbers - Kit Just Arrived

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    First Set of Numbers - Kit Just Arrived

    FC: 5
    PH: 7.5
    TA: 50
    CH: did not check
    CYA: I'm a bit confused by the black dot test. Will the dot disappear, or does it just get distorted. It appears my CYA is 10 or lower even after 4 days.

    Owned pool for 4 days, and have added (2-5 - 3oz) Shock (hyp-chlor 53%) each night.

    I intend to continue with shock to maintain FC levels until my CYA has achieved 40. Is this the correct action?

    Thanks,
    Darrin

    12' x 36" Intex AGP
    ~Scott
    15,000G 17x29 AG Splash Pool, sand filter, 1.5hp Pentair

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    Join Date
    Feb 2008
    Location
    Denton, TX
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    Re: First Set of Numbers - Kit Just Arrived

    Yes, on the CYA test, once the dot disappears, that is when you take your reading. If the dot doesn't go away completely, you essentially have no CYA.

    CYA can be added by itself as stabilizer powder, it can be added by using chlorinating tablets to chlorinate, or it can be added using a product called dichlor. Some products that are sold as "pool shock" are dichlor and this will get your CYA up quickly. It sounds like what you are using (hyp-chlor 53%) is calcium hypochlorite. This will not add CYA to your water.

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    Re: First Set of Numbers - Kit Just Arrived

    Ok, I'll see if I can find any stabilizer locally.

    Thanks,
    Darrin
    ~Scott
    15,000G 17x29 AG Splash Pool, sand filter, 1.5hp Pentair

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    Re: First Set of Numbers - Kit Just Arrived

    I was able to find liquid stabilizer at Lowes. Should I attempt to achieve 40ppm in one dose, or should I build it up gradually over the next few days.

    Intex 12' x 36" APG

    Thanks
    ~Scott
    15,000G 17x29 AG Splash Pool, sand filter, 1.5hp Pentair

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: First Set of Numbers - Kit Just Arrived

    CYA needs a week to dissolve before you measure the level again. I would aim for 40 all in one go, wait a week to see where you ended up, and then make any further adjustments that might be required at that point.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: First Set of Numbers - Kit Just Arrived

    Since you bought the liquid stabilizer, it will dissolve pretty much immediately. The powdered kind of stabilizer takes upwards of a week to dissolve. Add the liquid stabilizer and check the CYA in an hour.

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