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Thread: Cloudy Water

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    LowSL2's Avatar
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    Cloudy Water

    Hi everyone. I've Been lurking on this forum for a while now. We bought a house with a pool back in June. It was a swamp and after reading tons of helpful topics on here I got it sparkling clear.

    Now I have a problem that has me scratching my head. Last Saturday I noticed the pool getting cloudy. I sweep the pool regularly. And was checking chemistry with those test strips that everyone loves and with my OTO test kit. Here are my (inaccurate) numbers when the pool was cloudy with the test strips:

    TC = 1
    FC = 3
    pH = 7.8
    TA = ~120
    CYA = ~40
    CH = ~500

    Checked with my OTO test kit too and TC and pH were the same with that test.

    So thinking I was probably having an algae outbreak, I put in two gallons of 6% bleach and let the pump run 24/7. I watched it for a few days and the cloudiness didn't go away. So I pulled the filters out and cleaned each cartridge. They were pretty filthy. Which confused me more since pressure has remained unchanged at 10psi since I last cleaned the filters a couple weeks ago. So since I was done with the test strips I took a sample to Leslies to verify my findings. The guy there said that if I hadn't told him the pool was cloudy, he was going to say the water was fine. Here's their numbers:

    TC = 5
    FC = 5
    CH = 300
    CYA = 40
    TA = 110
    pH = 7.6
    TDS = 1700

    Since I needed a new kit, I bought the DPD test kit that tests FC, TC, CC, pH, TA. I didnt get the FAS-DPD because funds are tight this month (I had to use spare change just to buy this kit). So I've been checking the chemistry in the morning and at night. And my numbers are unchanged and the water is still cloudy. Water is flowing strong out of the eyeballs, pressure is constant at 10psi. I'm running the pump 24/7.

    Does anyone have any suggestions on what I should do? I'm stumped.

    Thanks!
    -Jeff
    18,400 Gallon, Fiberglass, IG Pool Built in 1980, 14' x 32', 3' to 8' deep.
    Mytilus M-90 Cartridge Filter, 90 sq ft area, 90 gal/min
    Pac Fab 1.5HP Pump

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    Mod Squad jblizzle's Avatar
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    Re: Cloudy Water

    Welcome to TFP!!!

    I cringed when you said you bought the DPD test ... you really need the FAS-DPD test and ordering the K-2006 online could not have been much more (if at all) than what you paid to Leslies.

    Given the cloudy water, you need to go through the shock process as described in Pool School. For a CYA of 40ppm (if you can believe that test since it is the one the stores seem to struggle the most with), the shock level is a FC of 16ppm. You MUST keep the FC at 16ppm until you pass the 3 tests to stop ... that is why you need the FAS-DPD chlorine test.

    You can limp by if you dilute the water sample and use 33% pool and 66% distilled water for the DPD test ... and then triple the reading ... but you are going to loose a lot of accuracy and actually seeing a 1ppm change is virtually impossible.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    dmanb2b's Avatar
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    Re: Cloudy Water

    Yeah...two gallons of 6% bleach in an almost 20k gal pool won't do much. That's only about 7, maybe 8ppm FC. You have to raise to shock level and hold it at that level until the water clears, overnight FC loss is 1ppm or less and CC is 0.5 or less. Jason gave you very solid advice.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    LowSL2's Avatar
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    Re: Cloudy Water

    Ok. Sounds good. I'll have to wait a few week.s to get the good test kit. This one was $28. I've been checking FC and TC and it hasn't changed at all. It's holding at or above 5. Thanks for the input!
    -Jeff
    18,400 Gallon, Fiberglass, IG Pool Built in 1980, 14' x 32', 3' to 8' deep.
    Mytilus M-90 Cartridge Filter, 90 sq ft area, 90 gal/min
    Pac Fab 1.5HP Pump

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    Mod Squad jblizzle's Avatar
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    Re: Cloudy Water

    Try diluting the water to get a better idea of how far above 5ppm your FC is.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  6. Back To Top    #6
    LowSL2's Avatar
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    Re: Cloudy Water

    Quote Originally Posted by jblizzle
    Try diluting the water to get a better idea of how far above 5ppm your FC is.
    How do I do that? I'm bad with math so bear with me...

    Thanks

    -Jeff
    18,400 Gallon, Fiberglass, IG Pool Built in 1980, 14' x 32', 3' to 8' deep.
    Mytilus M-90 Cartridge Filter, 90 sq ft area, 90 gal/min
    Pac Fab 1.5HP Pump

  7. Back To Top    #7
    Mod Squad jblizzle's Avatar
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    Re: Cloudy Water

    Well, somehow you have to use 50% pool and 50% distilled water and then double the test reading
    or like I said above
    use 1/3 pool and 2/3 distilled and then triple the test reading.

    The error comes in depending on how well you get the ratios correct.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  8. Back To Top    #8
    LowSL2's Avatar
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    Re: Cloudy Water

    The pool is looking crystal clear today. Thanks for the advice everybody.

    -Jeff
    18,400 Gallon, Fiberglass, IG Pool Built in 1980, 14' x 32', 3' to 8' deep.
    Mytilus M-90 Cartridge Filter, 90 sq ft area, 90 gal/min
    Pac Fab 1.5HP Pump

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