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Thread: Cloudy water

  1. Back To Top    #1

    Join Date
    May 2010
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    Central Connecticut
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    157

    Cloudy water

    Helping a friend. They have an 18x36 in ground pool 5' deep. Still have slight cloudiness. We're told by pool store to change sand in filter. I am trying to convert them to bbb. I used my tf100 to test their water. Here are the results.

    FC 12.5
    Cc .5
    Ph 7.5
    TA 150
    CH 140
    CYA 45

    Sand filter pressure at 12 psi

    Pool slightly cloudy. They were told to "filter aid" ? Help. I can't see anything obvious.
    18x36 IG 26,000 gal, Vinyl Liner, 24" Sand filter Hayward S224T, Jandy AE3000 heatpump and 1.5 HP SuperPump. Circupool RJ45 SWG

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    37,879

    Re: Cloudy water

    How long has it been since it was worse? Sand filters can take quite a while to clean up the water, often a week or more. If everything is working there should be a visible improvement from day to day, but it can still take a while.

    There is no point in changing the sand. Adding a little DE to the sand filter might help, using clarifier might help. Neither is by any means certain to help.
    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

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    Re: Cloudy water

    It's been open about a week. Based on the numbers, should I shock the pool up to 20 with bleach?
    18x36 IG 26,000 gal, Vinyl Liner, 24" Sand filter Hayward S224T, Jandy AE3000 heatpump and 1.5 HP SuperPump. Circupool RJ45 SWG

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    Smykowski's Avatar
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    Sep 2011
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    Gurnee, IL (North Suburban Chi-town)
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    Re: Cloudy water

    Quote Originally Posted by richmgreen
    ....should I shock the pool up to 20 with bleach?
    Are you sure they're on board? If they're not 100% behind BBB (even if it is to let you take the lead, then resume maintenance when it's under control), you'll spin your wheels and waste your time.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Isaac-1's Avatar
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    May 2010
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    SW Louisiana
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    Re: Cloudy water

    With .5CC and cloudy water shocking may be the safe thing to do, just keep in mind even after everything is dead in the water it still takes a while for a sand filter to clear it out. To answer your question about replacing sand, around here it is generally felt that sand rarely needs replacing, you may need to open it up and clean up the gunk from the top layer of sand, but in reality the sand is usually good for the life of the filter housing. A lot of people here swear by adding a small amount of DE filter compound to their sand filters (this will get flushed out during back washing) to aid in clearing up a cloudy pool, there are also liquid floculants you can add to help speed the process. If this is worth the extra money, vs giving it more time is up to you.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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