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Thread: Can't clear my water!

  1. Back To Top    #1

    Can't clear my water!

    Just had a pool built, opened it about two weeks ago.
    Water was very clear at first, then the chlorine level started to get low (not sure exactly how low since at the time I was using builder-provided test strips). So I shocked with Calcium Hypochlorite. Immediately the water became cloudy and has remained that way since.

    I have, after spending hours per day reading the site over the last week:
    - Purchased a Taylor K-2006 test kit
    - Started the process of getting CYA to the 30-50 range (builder did not add any, just left me with dichlor pucks)
    - Decided that when CYA gets to that range I will stop using stabilized chlorine in favor of bleach
    - Started the process of muriatic acid/aeration to lower TA

    The pool is slowly starting to clear again, chlorine levels have remained stable with the use of the dichlor in the automatic feeder and supplemental bleach if it starts to creep lower.

    My main problem is that there is now a white powdery substance settling on the bottom of the pool that I can't identify. When people swim it gets stirred up and the water gets cloudy, so I try to vacuum it up whenever I see it. Am I on the right track to getting my clear water back again?!

    Current test results
    ---------------------
    Free chlorine: 4.2
    Combined chlorine: 0
    pH: 7.2
    TA: 275
    CYA: ~20 (that's an estimate, it's not quite 30 yet)
    Calcium Hardness: 260
    33,000 gallon vinyl in ground
    20GPM sand filter
    1HP pump

  2. Back To Top    #2

    Join Date
    Apr 2011
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    Lynchburg VA
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    393

    Re: Can't clear my water!

    I dont have any idea what the white substance might be but I would purchase some stabilizer and get the CYA up to 50 instead of waiting for the pucks to accomplish it. I'm just not that patient and the stabilizer is pretty cheap.
    18x36 Vinyl In-ground w/roman ends 27,400G, Hayward 3/4hp with 300# sand filter. Hayward heat pump heater

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  3. Back To Top    #3

    Re: Can't clear my water!

    That was my thinking too, thanks for verifying.
    I've added about 8 pounds of granular CYA over the last few days using the sock in front of a return method.

    I'm going now to buy more and finish bringing it up the rest of the way. Chlorine held steady at around 4 today with rain, then sun, then people swimming (and the the chlorine auto feeder on).

    Still annoyed by the white powdery stuff and my cloudy water though...
    33,000 gallon vinyl in ground
    20GPM sand filter
    1HP pump

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    Melt In The Sun's Avatar
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    Oct 2009
    Location
    Tucson, AZ
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    Re: Can't clear my water!

    Sounds like calcium clouding to me. Though your pH isn't high, adding cal-hypo can locally raise it really high, which combined with your high TA could cause tiny calcium carbonate crystals to form. I'd start the TA reduction right away, keep the pH low (7.2 or so), and see if it filters out. You could try adding DE to your filter; that would help it filter out the tiny stuff.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
    Make each day your masterpiece. - John Wooden

  5. Back To Top    #5

    Join Date
    Apr 2011
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    Lynchburg VA
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    Re: Can't clear my water!

    I recommend adding DE to the filter as well. There is a section in the pool school that explains how to do it and it should help clear up the water.
    18x36 Vinyl In-ground w/roman ends 27,400G, Hayward 3/4hp with 300# sand filter. Hayward heat pump heater

    Pool School
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  6. Back To Top    #6

    Re: Can't clear my water!

    Or use Fiber Clear for the filter. Traps a lot more particles than DE does, washes off easier than DE, and is SAFE!
    Intex 15x48 metal frame 4,400 gallon AG. Dual stock pump setup using Filbur (A) filters.

  7. Back To Top    #7

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    30,085

    Re: Can't clear my water!

    With so many reports of inconsistent performance on DE substitutes and sand substitutes, I would take the above post about Fiber Clear with a word of caution.

    All these substitutes usually require some time in the marketplace before they find a niche (if they ever do) and the initial results we see posted here are certainly mixed at best.

    Ending the use of cal hypo in your pool and switching to liquid chlorine is probably the single best thing you can do to clear your pool. Run the pump 24/7 as well.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  8. Back To Top    #8

    Re: Can't clear my water!

    Thanks for the responses, finding this site has helped get me off on the right foot with the new pool, and it is much appreciated.
    Just started my 2nd round of muriatic/aeration this morning, I will read up on DE as well.

    Thanks again!
    33,000 gallon vinyl in ground
    20GPM sand filter
    1HP pump

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