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Thread: FC @0

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    FC @0

    Help, all # good except for FC at 0 after adding 12 pds shock , any clues
    Hello, I have a 24x24x52in AG Pool ,holds about 15200 gal. Have a 2 speed pump and 300lb. sand filter. Live in Texas in City of Lewisville

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    Mod Squad jblizzle's Avatar
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    Re: FC @0

    Welcome to TFP!!!

    What test kit are you using?
    Please post all the results that are "good".
    What kind of "shock" did you add? ... likely adding that much was a really bad idea.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    mrcarcrazy's Avatar
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    Re: FC @0

    What are you using to test your pool chems?
    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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    Richard320's Avatar
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    Re: FC @0

    Welcome!

    We're not here to sell you a test kit. The obsession on what you used to test is because test strips can actually bleach out from high chlorine levels and although you see zero, it could actually be really high. If by chance, you used 73% Cal-hypo, it would have driven your FC to 34! That's HUGE. And enough to bleach out a test strip.

    May we assume the water is green and/or cloudy because you added massive amounts of shock?

    Best thing right now is to Read This
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: FC @0

    Took water sample too Leslies

    Hello, I have a 24x24x52in AG Pool ,holds about 15200 gal. Have a 2 speed pump and 300lb. sand filter. Live in Texas in City of Lewisville

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    Mod Squad jblizzle's Avatar
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    Re: FC @0

    Whelp ... that is your problem.

    Pool store testing and advice is horrendous.

    If you want to take control of your pool, you need to invest in one of the Recommended Test Kits and after checking all the levels, follow the ShockLevelAndMAINTAIN Process to clean up your pool.

    What "shock" did you use as that will clue us in to the condition of your water.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Texas Splash's Avatar
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    Re: FC @0

    Hello Long12! No worries, I fell into that same trap once upon a time. Golden rule - Avoid the pool store for testing, advice, or products. You simply won’t get the advice/service you deserve and you will waste money on products your pool doesn’t need. We've all learned (from personal experience) you cannot reply on pool store tests, test strips, or simple over-the-counter kits. They don't read Free Chlorine (FC) or Cyanuric Acid (CYA) levels accurately or to the high levels we need. I hope you are able to cross-over to the TFP side and let us help you.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: FC @0

    Quote Originally Posted by jblizzle View Post
    Whelp ... that is your problem.

    Pool store testing and advice is horrendous.

    If you want to take control of your pool, you need to invest in one of the Recommended Test Kits and after checking all the levels, follow the ShockLevelAndMAINTAIN Process to clean up your pool.

    What "shock" did you use as that will clue us in to the condition of your water.
    Thanks for reply, I used a 78% calhydroclor. I test w/5 hth liq test kit


    Hello, I have a 24x24x52in AG Pool ,holds about 15200 gal. Have a 2 speed pump and 300lb. sand filter. Live in Texas in City of Lewisville

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    Texas Splash's Avatar
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    Re: FC @0

    Well, going back to your original post, "All # good except...." may seem fine for now (by looking at the water), but I suspect that will change real quick with pool store "shock products" and an HTH test kit. They just don't meet the needs of proper testing. I'd highly encourage you to order the proper test kit (i.e. TF-100 in link below) to prevent any problems down the road.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Mod Squad jblizzle's Avatar
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    Re: FC @0

    By "calhydroclor" I assume you mean cal-hypo?

    So you added 12 pounds which is over 60ppm of FC and 50ppm of CH to your pool.
    I would guess your test kit is bleached out and showing no FC when you actually may have a high level.
    OR
    There is so much junk in the pool it consumed it all.

    Impossible to know without the FAS-DPD chlorine test.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: FC @0

    Pool water is actually very clear. I have no clues as to this problem. I've been doing this for 18 years at least never ran into this. Pulled cover off last Thur, just a little cloudy and green, added 2 lbs of schock and later 2oz copper algaecide. Tested next morn. Pool clearer, ph at 7.3 Fac 0. Now at this time FC 0.7?


    Hello, I have a 24x24x52in AG Pool ,holds about 15200 gal. Have a 2 speed pump and 300lb. sand filter. Live in Texas in City of Lewisville

  12. Back To Top    #12
    Mod Squad jblizzle's Avatar
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    Re: FC @0

    Quote Originally Posted by long12 View Post
    I've been doing this for 18 years at least never ran into this.
    We hear variation of this over and over again ... it "works" {you get lucky} until it doesn't.

    The TFPC method is really just about understanding your pool’s chemistry and through accurate testing, adding only what the pool NEEDS and not what someone wants to sell you.

    The story is the same. 1. Get a good test kit. 2. Follow the SLAM process.

    BTW, we never recommend adding copper (or any metal) to the pool as it can result in staining and green hair. And generally algaecide is NEVER needed when you maintain a properly balanced pool.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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