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Thread: cloudy water

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    cloudy water

    My water was cloudy 2 weeks ago, but my test were all in line. I shocked the pool 3 times in a week, then it was clear again. I then swept the pool out, backwashed my sand filter on Sunday. It is now cloudy again and the test results are still good.

    Only things i can come up with:
    1. it rained both times hard before the water went cloudy ????
    2. Filtration: my sand has been in the filter for over 3 years, do i need to replace the sand?

    Any help would be appreciated, thanks
    27' round AG pool, 54" high, Pentair 2 speed Pump;
    150 Sq ft. Clean & Clear Cartridge Filter;

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: cloudy water

    You should post a full set of water test results. We can tell you much more with test results.

    Sand should last five to seven years minimum. Some people never change their sand.
    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

  3. Back To Top    #3

    Re: cloudy water

    Sorry! my test kit only runs the following.

    TC - 4
    ph - 7.2
    TA- 110
    CYA - 90
    27' round AG pool, 54" high, Pentair 2 speed Pump;
    150 Sq ft. Clean & Clear Cartridge Filter;

  4. Back To Top    #4

    Re: cloudy water

    Just so you know I had trouble with my pool at the end of last year and a friend told me about this site. After reading the pool chemistry i realized my CYA was way to high at the start of the year, so i drained 3/4 of my pool and got the CYA to the 90 range. I have just used bleach this year so i wouldn't raise my cya and everything has been good til now. I also used borax to get my PH up to 7.2 at the beginning of the year.
    27' round AG pool, 54" high, Pentair 2 speed Pump;
    150 Sq ft. Clean & Clear Cartridge Filter;

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: cloudy water

    With CYA at 90, you need to keep the FC level around 7 to 12 for normal day to day use. With CYA at 90 shock level is between 24 and 35. I doubt that you have been adding enough chlorine to get up into that range, so you most likely still have algae in the water.

    The best thing to do would be to replace some more water, to get CYA down to around 50 or 60. If that isn't possible, it is going to take a massive amount of chlorine to clean everything up properly.
    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

  6. Back To Top    #6

    Re: cloudy water

    ok, thank you
    27' round AG pool, 54" high, Pentair 2 speed Pump;
    150 Sq ft. Clean & Clear Cartridge Filter;

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