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Thread: Cloudy Water Low PH High TA

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    Cloudy Water Low PH High TA

    Hello,

    I'm new to this forum and I'am having a problem with High TA /Low PH and cloudy water. Here is my pool specs. Can anyone offer some guidance? Plus FC burns off during the day

    28,500 inground Gunite
    Temp 86 degrees
    New sand replaced last summer

    FC 2.0
    ph 7.2
    TA 180
    CA 400
    CYA 30
    Salt Pool - Jandy Auqa Pure Chlorinator
    17000 Gal.
    Gunite

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

    Re: Cloudy Water Low PH High TA

    Can you give us more details about how the water looks? Also can you tell us more about what "Plus FC burns off during the day" means?

    Cloudy water is almost always algae. The solution for an algae problem is to shock the pool.
    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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    Guest

    Re: Cloudy Water Low PH High TA

    If your FC is burning off during the day but you do not lose chlorine overnight (test after sundown and again at sunrise) then you need to bring up the CYA
    Otherwise you probably have a nascent algae bloom and you should shock and then run your FC at bit higher than 2 ppm since that is the MINIMUM a pool with 30 ppm CYA should be kept.
    pool-school/chlorine_cya_chart_shock

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    Re: Cloudy Water Low PH High TA

    Thanks for the help I will add some shock. But how high should the FC rise to be affective enough, and will it raise the TA also?
    Salt Pool - Jandy Auqa Pure Chlorinator
    17000 Gal.
    Gunite

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    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Cloudy Water Low PH High TA

    Adding chlorine will not raise TA. Calcium hypochlorite will raise your CH, which you haven't reported yet; dichlor-blahblah will raise your CYA. Liquid chlorine/bleach will add basically nothing (just a tiny bit of salt, pretty much all chlorines do that).
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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

    Re: Cloudy Water Low PH High TA

    Quote Originally Posted by madms1
    Thanks for the help I will add some shock. But how high should the FC rise to be affective enough, and will it raise the TA also?
    Your shock level is 12, according to the CYA chart, so for your pool thats about 3 large 182 oz jugs of 6% bleach.

    You'll probably need more than that though, that's just to reach shock level the first time. Ignore your PH readings if the FC is above 12, that will read false high. Only adjust PH if the FC is below 10.
    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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