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Thread: FC didn't shoot up like expected

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    FC didn't shoot up like expected

    Yesterday I was at 0 FC and went and bought 12.5% from the store. The calculator said to add 136 oz to get it up to 10, my cya is 90-100. I just checked and I'm only at 4.4 FC and 0 cc. Should I just go to the calculator and put in current FC and goal again and add that amount and keep doing this until I reach the level needed?
    Jeff

    30' x 17' plaster pool 13.5k gallons (roughly), The Pool Cleaner (two wheel), Taylor k-2006, Pentair WhisperFlo 1.0hp, Purex triton WhisperFlo .5 hp (no idea why there's two pumps)

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    Richard320's Avatar
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    Re: FC didn't shoot up like expected

    How's the water look? Is it clear, cloudy, or green? If there's something growing in there, you'll use up bleach fast. I'd try again. By any chance, is that bleach from Lowes or Home Depot? If it sat outside all year, it could have lost strength.
    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 didn't shoot up like expected

    Crystal clear. It's from the local pool store, deposit jugs. I came home last night and poured 136oz in.

    When do I get CC? Is it when there's more than enough FC? Not sure I completely understand. CC is when it's being used and FC is what I have available? So shouldn't my readings have CC? I'm 4.4 FC and 0 CC.
    Jeff

    30' x 17' plaster pool 13.5k gallons (roughly), The Pool Cleaner (two wheel), Taylor k-2006, Pentair WhisperFlo 1.0hp, Purex triton WhisperFlo .5 hp (no idea why there's two pumps)

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    Richard320's Avatar
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    Re: FC didn't shoot up like expected

    Quote Originally Posted by Jfdelman View Post
    Crystal clear. It's from the local pool store, deposit jugs. I came home last night and poured 136oz in.

    When do I get CC? Is it when there's more than enough FC? Not sure I completely understand. CC is when it's being used and FC is what I have available? So shouldn't my readings have CC? I'm 4.4 FC and 0 CC.
    Something might be growing in there. Keep adding until it holds.
    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 didn't shoot up like expected

    Just keep adding the recommended dosage from where I'm at each time to my goal? Or should I up my goal and go heavier?
    Jeff

    30' x 17' plaster pool 13.5k gallons (roughly), The Pool Cleaner (two wheel), Taylor k-2006, Pentair WhisperFlo 1.0hp, Purex triton WhisperFlo .5 hp (no idea why there's two pumps)

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    Richard320's Avatar
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    Re: FC didn't shoot up like expected

    Quote Originally Posted by Jfdelman View Post
    Just keep adding the recommended dosage from where I'm at each time to my goal? Or should I up my goal and go heavier?
    That's up to you. With CYA at 100, shock level is 39! That's a mess of bleach. See how long the next normal dose lasts and decide. Or do an overnight loss test tonight and see if a SLAM is needed.
    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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    Mod Squad pooldv's Avatar
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    Re: FC didn't shoot up like expected

    I would probably aim for shock level. It is important not to let the FC drop below the minimum for your CYA level or whatever is consuming chlorine will grow and you will lose progress everyday. Chlorine CYA Chart. For CYA of 100 every time your FC drops below 7ppm you are inviting algae to your pool party.
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    Re: FC didn't shoot up like expected

    You really need to lower the CYA, but the only way to do that is by draining part of the pool. As long as your CYA is high you will need to keep the chlorine (FC) level a a correspondingly high level.

    Also in answer to your earlier question CC is not something you want to see in testing. It is a byproduct of the chlorine destroying organic matter in the pool. Any time the CC rises to 1.0 or above it indicates you have a problem.

    Highly reccomended that you spend some time reading at Pool School. It's the button at the upper right of this page. It may seem a bit confusing at first but it's really all explained there.
    chiefwej
    Tucson, AZ
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