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Thread: Cloudy blue water and brownish stuff . . .

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    Join Date
    Oct 2011
    Location
    Mebane, NC
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    Cloudy blue water and brownish stuff . . .

    It's been a great summer so far . . . but for health reasons (where's my cane?) I had to neglect my pool for three days. Now it has lost it's sparkle - especially in the deep end. Cloudy but not green. There are also brownish marks that aren't stains and brush off easily. I was thinking the dreaded mustard algae but the spots appear in the bright sunshine areas of the pool - shallow and deep end. Pollen from close by pine trees and other trees? I've been vacuuming and brushing and now think it's time to shock - which I've never done - New pool - first season. I just added some bleach and the FC is 5 - it was probably close to 0 because it hadn't been done in a few days.

    Here's my test results:

    FC 5
    CC 0
    TC 5
    pH 7.6
    TA 90
    CH 270
    CYA 22

    Read in Pool School that I will need to shock to FC 15.

    What do I do first? Increase CYA to 35? Do the OCLT? Shock?

    I love this forum!
    Billie
    20 x 40 IG 26,000 gal. vinyl
    Hayward sand filter S244T 62 GPM
    Hayward 2.0 hp Super Pump Mdl SP2615X20
    T-100 Kit
    Pool School

  2. Back To Top    #2
    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    18,768

    Re: Cloudy blue water and brownish stuff . . .

    I'd raise FC to 12, then recheck it every couple hours and keep raising it back to 12. About sunset, take a reading so you can try the overight loss test

    If it passes, then your problem is probably not algae, but something else. Like pollen. Or dust. Look at the car and the patio furniture and the window sills? Are they dusty?

    Be sure you have good circulation at the bottom of the pool, aim the return down if it's not.

    If it doesn't clear up, you might consider adding DE to your filter. But be sure there's no algae bloom before you try that.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Join Date
    Oct 2011
    Location
    Mebane, NC
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    Re: Cloudy blue water and brownish stuff . . .

    Quote Originally Posted by Richard320
    I'd raise FC to 12, then recheck it every couple hours and keep raising it back to 12. About sunset, take a reading so you can try the overight loss test

    If it passes, then your problem is probably not algae, but something else. Like pollen. Or dust. Look at the car and the patio furniture and the window sills? Are they dusty?

    Be sure you have good circulation at the bottom of the pool, aim the return down if it's not.

    If it doesn't clear up, you might consider adding DE to your filter. But be sure there's no algae bloom before you try that.
    Richard ~

    PPM went down 2 last night. Guess that means I need to shock. Or should I retest?

    Thanks! Billie
    20 x 40 IG 26,000 gal. vinyl
    Hayward sand filter S244T 62 GPM
    Hayward 2.0 hp Super Pump Mdl SP2615X20
    T-100 Kit
    Pool School

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    Butterfly's Avatar
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    May 2007
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    South Carolina
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    10,045

    Re: Cloudy blue water and brownish stuff . . .

    Not sure of the starting FC at the beginning of the OCLT test last night, but if the pool lost 1ppm or more overnight, then you should start the shock process.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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  5. Back To Top    #5

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    Oct 2011
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    Mebane, NC
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    Re: Cloudy blue water and brownish stuff . . .

    Started to shock. Can I vacuum while in the shock process? I just got through brushing. There is a lot of yellow/light brown dust on the bottom in no particular pattern. Just looks like fine dirt. The sides are clean. The shallow end is clear. Deep end is cloudy.

    I'll be back . . .
    20 x 40 IG 26,000 gal. vinyl
    Hayward sand filter S244T 62 GPM
    Hayward 2.0 hp Super Pump Mdl SP2615X20
    T-100 Kit
    Pool School

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    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Cloudy blue water and brownish stuff . . .

    Yes, you can vacuum.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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