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Thread: How long to see even 20 ppm of CYA

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    How long to see even 20 ppm of CYA

    I have a 10K Gallon pool. I've put in about 86 oz of CYA into the pool in the past two days (Tuesday 56, Wednesday 30)(today is thursday evening). I know CYA is supposed to dissolve slowly etc and can take up to a week but I'm still getting a reading of 0 and is that normal ? I would think I would at least be seing 10 or 20 ppm at this point and my test using the Taylor test kit has me clearly below 20 ppm. Does that seem odd to any of you guys ? I'm afriad to put more in cuz i don't wanna have too high of a CYA to start out with and then have to drain the pool a bit. Thoughts ?
    sbelgrave @ Westminster, MD
    Size : 16 x 32 x 4
    Volume : 12,000 Gallons
    Material :Vinyl
    Water Type : Non-Saltwater

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,887
    Don't worry about it. The test can sometimes read zero even when the CYA level is as high as 20. Give the CYA the full week to dissolve and then test it.
    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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    Thanks Jason .
    sbelgrave @ Westminster, MD
    Size : 16 x 32 x 4
    Volume : 12,000 Gallons
    Material :Vinyl
    Water Type : Non-Saltwater

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    Join Date
    Aug 2007
    Location
    Northern Kentucky
    Posts
    20
    Nm just googled my answer
    27 ft. round AG pool with 54" walls, 18,065 gallons, 22inch Sparco sand filter with 2.0 HP 2 speed pump

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