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Thread: FC holding steady without running SWG - is this normal?

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    *JLS*'s Avatar
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    FC holding steady without running SWG - is this normal?

    I know it seems like a good thing that my FC is not dropping, but I'm just curious if this sounds right.

    My pool is in direct sunlight most of the day. I tested FC 3 days ago and it was 9 with CYA at 60. I turned the SWG off because I'm aiming for FC of 5. SWG has not been running for 3 days and my FC today is only showing 8.5. Could the stabilizer just be holding my levels steady that well?

    I'm certain that I'm performing the test (with TF-100) correctly and I do not use any other form chlorine. Am I missing something or does this seem normal? Or am I just overthinking this?
    ​Jennifer
    19k gal, 27' x 54" AG Aqua Leader Saltwater 8000 installed April 2014; Aqua Pro 19" Sand Filter System 1.5-hp Pump; Hayward Aqua Trol Salt Chlorine Generator System; Overlap Boulder Swirl Liner; Polaris 65 Turbo Turtle Automatic Cleaner; TF-100 Testing Kit

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    Azgirl71's Avatar
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    Re: FC holding steady without running SWG - is this normal?

    Mine took almost a week to drop after my SLAM.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Mod Squad pooldv's Avatar
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    Re: FC holding steady without running SWG - is this normal?

    It will start dropping soon enough.
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    JasonLion's Avatar
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    Re: FC holding steady without running SWG - is this normal?

    Over 3 days with CYA at 60, no that is not plausible. How sure are you that the SWG is actually turned off? Or perhaps someone else is adding chlorine?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Divin Dave's Avatar
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    Re: FC holding steady without running SWG - is this normal?

    What has the weather been like? Any clouds? And yes, the CYA will definitely show down the FC burn.
    the weather isnt super hot yet with lots of UV yet like it will be in July
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    *JLS*'s Avatar
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    Re: FC holding steady without running SWG - is this normal?

    Well today my husband confesses "Oh wait, I think I did turn it on for a few hours a couple of days ago."�� I knew something wasn't right because we've barely had a cloud in the sky for weeks now.

    I tested again just now and it's down to 7.5

    Thanks everyone for the input. I'll drill my husband a little better before I post next time. Haha
    ​Jennifer
    19k gal, 27' x 54" AG Aqua Leader Saltwater 8000 installed April 2014; Aqua Pro 19" Sand Filter System 1.5-hp Pump; Hayward Aqua Trol Salt Chlorine Generator System; Overlap Boulder Swirl Liner; Polaris 65 Turbo Turtle Automatic Cleaner; TF-100 Testing Kit

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    n240sxguy's Avatar
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    Re: FC holding steady without running SWG - is this normal?

    Haha. That funny right there. At least he didn't add a bottle of algaecide or some other silly pool store magic potion.


    30K gallon IG vinyl. 1.5HP 2-speed Waterway Mustang pump. 600 lb sand filter. Polaris 280. Circupool SI-60+. TF-100

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