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Thread: Having trouble keeping FC up

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    Having trouble keeping FC up

    I am having to put what seems to me a lot of liquid chlorine in each day. I passed the overnight test, CC comes up 0. I do have a little bit of gritty trash in the bottom of the pool around my steps. I think it is sand that got in pool from where they had it on concrete while replacing bottom and liner. I had to put 92 ozs in it this morning.

    CYA is 60
    Using 10% liquid chlorine
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

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    kcindc's Avatar
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    Re: Having trouble keeping FC up

    Can you post of a full set of results?

    Have you done the OCLT test to see if you having something like algae growing in your pool? Pool School - Perform the Overnight FC Loss Test (OCLT)

    Are you putting in 92 oz a day? If so, that isn't a lot considering the size of your pool.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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    Re: Having trouble keeping FC up

    Quote Originally Posted by kcindc View Post
    Can you post of a full set of results?

    Have you done the OCLT test to see if you having something like algae growing in your pool? Pool School - Perform the Overnight FC Loss Test (OCLT)

    Are you putting in 92 oz a day? If so, that isn't a lot considering the size of your pool.
    Yes, I passed overnight test.
    pH 7.8
    CH 30
    TA 60
    CYA 60

    - - - Updated - - -

    Last yr I didn't add as much with a higher cya
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

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    kcindc's Avatar
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    Re: Having trouble keeping FC up

    What is your FC now?

    Are you putting in 92 oz a day on average?
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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    Re: Having trouble keeping FC up

    Fc is 7
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

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    Re: Having trouble keeping FC up

    Quote Originally Posted by kcindc View Post
    What is your FC now?

    Are you putting in 92 oz a day on average?
    Are you putting in 92 oz a day on average?
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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    Re: Having trouble keeping FC up

    Quote Originally Posted by kcindc View Post
    Are you putting in 92 oz a day on average?
    Yes. Pretty much
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

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    Mr Bruce's Avatar
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    Re: Having trouble keeping FC up

    Define "a lot". 92 oz will raise your FC 3. With as hot and sunny as it's been, that's not that much to lose everyday.

    Also, are you checking date codes? What's your source for chlorine?
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    kcindc's Avatar
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    Re: Having trouble keeping FC up

    I don't think 92 oz is a lot and is about the expected amount of FC loss per day at the height of summer. The sun is the strongest this time of year, so I don't have any concerns that you are adding 92 oz a day.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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