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Thread: CYA way high

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    CYA way high

    Finally got my test kit. Results as follows:
    FC = 37 CC = 0 TC = 37
    pH = 7.5
    TA 210
    CYA (off the scale)
    I mixed 10ml pool water with 90ml distilled water, repeated the test. Result was 30 (x10 = 300)

    Repeated the all tests with same results.
    Plan to remove and replace much of the water. I can probably draw down 2/3rds of the volume of the pool with my lowest intake.
    Any reason to not do it this way (removing so much water all at once?)
    Sacramento CA
    33,000gal, IG, circa 1970, (now) fiberglass over plaster, pac-fab paper cartridge, 1.5hp pump, polaris 280 (inoperable, UV damage) with booster, solar heat (inoperable, leak in powermat), skimmer (inoperable, line clogged & possibly fractured under concrete), main drain inoperable (long standing problem), jury rigged deep intake, skimmer line work-around in progress.

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    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: CYA way high

    Leave a ft of water in the shallow end. It's to dangerous to drain any more than that.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: CYA way high

    Yeah, I think I would remove not much more than 1/3 at a time. If you do the math, the extra water is not really all that much.

    Unless you live near a swamp with a VERY high water table, probably a 50% drain is also perfectly safe.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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