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Thread: Chlorine / CYA Chart

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    justinjla's Avatar
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    Chlorine / CYA Chart

    My CYA and FC is currently 40 and 5. What does the shock FC mean in the chart? Sorry, newb here.
    17,000 gallon
    In ground tahoe blue plaster
    DE filter (DEV60)
    Jandy variable speed & jandy booster pump
    Jandy pro series heater

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    pwrstrk's Avatar
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    Chlorine / CYA Chart

    Shock is the FC level that will kill algae. If you have algae that's the FC level that needs to be maintained to kill the algae bloom.
    Here is the process you'll have to use if you have an algae bloom to kill it off.
    SLAM Process 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    justinjla's Avatar
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    Re: Chlorine / CYA Chart

    Great, thanks!
    17,000 gallon
    In ground tahoe blue plaster
    DE filter (DEV60)
    Jandy variable speed & jandy booster pump
    Jandy pro series heater

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    mrcarcrazy's Avatar
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    Re: Chlorine / CYA Chart

    If you haven't checked out "pool school" on the upper right corner of the screen (your right, not the screens). Check it out. some absolutely great info in there.

    here's the getting started link
    http://www.troublefreepool.com/conte...etting-started
    IG gunite/plaster pool/spa Started 1/17/14, Plastered 5/16/14
    Size: 12'-21'x39' free form, depth ranging from 4' to 7, attached 6 person spa with spillover.
    Equipment: Whisperflo 2hp pump, Pentair 30" sand filter, Pentair Mastertemp 400k BTU heater, 1hp Whisperflo for waterfalls, and a blower for spa floor

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    Kiss4aFrog's Avatar
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    May 2013
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    Hudson, WI
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    Re: Chlorine / CYA Chart

    If your CYA is 40 they you are correct in trying to maintain the FC at 5 and you need to never let it drop below 3 to maintain clean and clear water.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

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