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Thread: How to measure high FC level

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    How to measure high FC level

    I'm shocking my pool and the FC should be around 17, but my test kit only has a scale from .5-5. How do i know if it reaches 17?

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    Firefly2000's Avatar
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    Jul 2008
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    Re: How to measure high FC level

    Birch,

    Unfortunately you'll need a better test kit that can test for much higher levels. The one recommended around here is the TF100 kit. Check out http://www.troublefreepool.com/categ...kit_comparison for more information.

    Hope this helps.
    Daniel

    47000L (12500 gal)
    IG Quartzon Interior
    Rolachem Acid & Chlorine dosing
    Paramount In-floor cleaner
    1.5HP pump + Sand filter
    Solar heating under the great Aussie sun!

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    JasonLion's Avatar
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    Re: How to measure high FC level

    By far the best solution is to get a FAS-DPD chlorine test, which comes in the better test kits.

    However you can get a vague idea of your current FC level by diluting one part of pool water with three parts of distilled water (or other water without any chlorine in it), test that, and multiply the result by four. You lose a substantial amount of precision, with dilution the result is +-6 or worse, but you can get some idea of what your current level is.
    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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    Re: How to measure high FC level

    Thanks, i bought the recommended leslie kit FAS-DPD but it only measures from .5-5 fc.

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    frustratedpoolmom's Avatar
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    Re: How to measure high FC level

    Quote Originally Posted by birch
    Thanks, i bought the recommended leslie kit FAS-DPD but it only measures from .5-5 fc.
    You bought the Leslies DPD kit, that's different than the FAS-DPD. The FAS-DPD measures up to 50. TF-100 sells it for about $23.00.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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