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Thread: No CYA

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    No CYA

    I'm starting this BBB method and I got a TF 100 test kit. It reads no CYA. The pool calculator says I should add about 9 lbs. Can I trust this amount to add? I read too much CYA is a real pain to lower. I have powder HTH Stabilizer/Conditioner. I'm just a bit nervous about this step. Any advice is most welcome. Tom
    In ground vinyl 18x36, 26,700 gal. HP EC-65 DE filter.

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

    Re: No CYA

    I suggest adding about 2/3rds that much, wait a week, test CYA again, and adjust further from there. As you said, adding CYA is fairly easy. Taking CYA away is hard. So you don't want to add too much. The calculations are fairly good, but it is best to be completely safe.
    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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    Re: No CYA

    Thanks.
    In ground vinyl 18x36, 26,700 gal. HP EC-65 DE filter.

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: No CYA

    Use the sock method to the CYA.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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