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Thread: Cloudy Water Help

  1. Back To Top    #1

    Join Date
    Mar 2011
    Location
    Lawrence, KS
    Posts
    2

    Cloudy Water Help

    This is my first season with a pool. I opened the pool this spring and everything was great, in the past two weeks, the water has become cloudy and tonight I thought it may have a green tinge. Here are the test results from tonight:

    FC 2
    CC 0
    TC 2
    PH 7.8
    TA 100
    CH Didn't test, usually about 160
    CYA 80
    Salt 2870

    I was running the filter 24/7 and the water was clear, then I cut back to 6 hours per day at night, increased to 8 per day and tonight switched it to 12 per day. I don't know the flow rate for my pump, but 6 seemed liked enough with only 7200 gallons. We have also received 2-3 inches of rain the past two weeks.

    I would appreciate any help you can provide on clearing up the water, and an approach to maintain it.
    7200 Gallons
    Sand Filter
    AG
    1hp pump
    Intex SWG, No Copper

  2. Back To Top    #2

    Re: Cloudy Water Help

    You will likely need to add bleach, and possibly turn off the SWG until the water is balanced again. You'll need to wait for others to tell you more as I'm new to SWG. But I'm pretty sure your FC is too low. With a CYA of 80, and a SWG, your FC should be between 4 and 6.
    POOL: Intex ultra new in 2014 (32 x 16 x 52) (seasonal; on concrete pad covered with 1.5" extruded or whatever foam insulation sheets - ugly, but comfy); added a through-wall skimmer; I add salt for feel. EQUIPMENT: Pentair SuperFlo pump (1HP, 2SPD); Pentair cartridge filter (200 sq. ft); Pentair MasterTemp natural gas heater (400,000 btu) Climate/Location: Eastern Nebraska

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,082

    Re: Cloudy Water Help

    Yes, you have inadequate chlorine. Bring your FC up to at least 8-10ppm and see if that doesn't clear your pool. If it's not clear in 24-48 hours I would bring it up to shock value. Read How to "Shock your Pool" up in Pool School and follow that process specifically. I suggest you use only Clorox or liquid chlorine .
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    benavidescj's Avatar
    Join Date
    Apr 2010
    Location
    Fleming Island, FL
    Posts
    431

    Re: Cloudy Water Help

    After you get rid of the cloudiness per Dave's instructions you need to maintain your FC between 4-6 ppm. You might lower you TA a bit as well to around 60-70. This will help keep your pH in check.
    Carlos
    Pool: 28,000 gallons IG; IC 40 SWG; Pentair 120 gpm cartridge filter; Marble finish; Pentair Wisperflow 1.5 hp; Polaris 360
    Spa: 350 gallon; Bromine
    How to shock your pool

  5. Back To Top    #5

    Join Date
    Mar 2011
    Location
    Lawrence, KS
    Posts
    2

    Re: Cloudy Water Help

    Thanks for the help. Here's an update. The temperature here has been 100+, I brought the chlorine level up, but the conditions continues to deteriorate. Tonights test values:

    FC 16
    CC <.5
    TC 16 - 16.5
    PH 8.2
    TA 110
    CH N/A
    CYA 80

    Based on the results, I'm bringing the FC up to 21 (shock), and I've added 16 oz by weight of dry acid to bring the ph down, this should also bring the TA down. Pool calculator called for 19 oz of dry acid, but I thought I'd do this and retest in the morning and re calculate since I'm so far off on PH.

    Does it make sense that the PH would have gone up from 7.8 to 8.2 in two days?

    The color is turning more green, but there are no algae clumps.

    Does this plan make sense? anything else I should be doing?
    7200 Gallons
    Sand Filter
    AG
    1hp pump
    Intex SWG, No Copper

  6. Back To Top    #6
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Cloudy Water Help

    Don't test pH when FC level is above 10 as it will give a false high reading. When the FC level drops below 10, test and adjust pH to 7.2, circulate about 30 mins., and then retest to confirm target. Once your pH is set, continue shocking til done and don't retest or worry about pH while shocking.

    Shock level for 80 CYA is between 21 and 31. I think you should aim somewhere in the higher range and see how that works for you.
    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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