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Thread: wondering about chlorine consumption

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    Join Date
    Oct 2015
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    Rancho Cordova CA
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    wondering about chlorine consumption

    Started a SLAM Saturday. Up to last night the water was green and I could barely see the bottom. This morning the green was gone and water was clear. I am adding Chlorine per the chart here based on the FC amount tested. So, I need to maintain 16 PPM based on my CYA. I tested just now and I do it twice per day and I'm down to 8PPM. The water looks good. I'm wondering what is consuming all the Chlorine? I'm not seeing algae anywhere. I cleaned the filters Sunday. Is it possible they need to be cleaned again?
    Greg ~ My pool: Plaster, 19,500 Gal Century V-Green 165 variable pump 1.65HP; Pentair Clean and ClearCtg filter; Polairs 380 with 1/2hp booster pump. Taylor K-2006

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    Mod Squad jblizzle's Avatar
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    Re: wondering about chlorine consumption

    Has the pressure on the filter gone up? You need to clean it whenever the pressure rises 20-25% over the clean pressure.

    You will lose a higher # of ppm of FC to the sun, the higher the FC is. So that is part of the loss, and there is still likely some algae in the water.
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    Join Date
    Oct 2015
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    Rancho Cordova CA
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    Re: wondering about chlorine consumption

    how long with clear water and no sign of Algae do I bring it up to 16PPM?
    Greg ~ My pool: Plaster, 19,500 Gal Century V-Green 165 variable pump 1.65HP; Pentair Clean and ClearCtg filter; Polairs 380 with 1/2hp booster pump. Taylor K-2006

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    AimeeH's Avatar
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    Apr 2012
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    Columbia SC
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    Re: wondering about chlorine consumption

    Until you pass all three tests

    Clear water
    Cc of less than .5
    OCLT of less than 1

    OCLT = overnight free chlorine loss test.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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