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Thread: Not maintaining fc level

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    Not maintaining fc level

    My fc level isn't maintaining. I shock the pool and the next day my fc level will be back at 0. I have a basic Taylor test kit which only test for fc and ph.

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    Mod Squad JohnT's Avatar
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    Re: Not maintaining fc level

    Welcome to TFP!

    What you describe is perfectly normal. The chlorine could be all gone within an hour of adding it. You need to test and add chlorine as required very frequently until it holds. Check out SLAMing Your Pool to get the details.
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    Mod Squad YippeeSkippy's Avatar
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    Re: Not maintaining fc level

    Consider using liquid chlorine or even regular household bleach (not the scented, spashless or outside kind though) to bring your chlorine up again and again as needed. WHen you use a product called "Shock" it often is a "Stabilized" form of chlorine that also adds CYA to your water. Too much CYA causes problems and can't be removed unless you drain water off and refill with new water.
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    Re: Not maintaining fc level

    Thanks, I'm going to try adding bleach and see what this does

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    Richard320's Avatar
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    Re: Not maintaining fc level

    If you have no stabilizer (CYA aka Cyanuric acid) in the water, you'll lose pretty much all your chlorine within hours.

    If you have too much stabilizer, you might not be keeping enough chlorine in the water and algae is getting started.

    Did you just fill the pool? What does the water look like?

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    Re: Not maintaining fc level

    The water is crystal clear. I have an in line chlorinator and my pumps been running constantly since Wednesday. I'm not sure about my cya levels.

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    Mod Squad pooldv's Avatar
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    Re: Not maintaining fc level

    Welcome to TFP!

    Need to know your CYA level. You need to maintain you chlorine based on your CYA level according to this, Chlorine CYA Chart. Otherwise algae will grow which will consume all your chlorine very quickly.

    Please update your signature as described here, What we need to know to answer your questions

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    Mod Squad tim5055's Avatar
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    Re: Not maintaining fc level

    You have been given good advice. You need a quality test kit and the as John posted - SLAM your pool.

    Liquid chlorine will correct your problems. If pool stores in your are don't sell liquid chlorine at a reasonable price then plain bleach at WalMart will do.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Casey's Avatar
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    Re: Not maintaining fc level

    You need a TF100as already posted and post up your test results all the while reading Pool School.

    Welcome to TFP. We can help You, if you help yourself to Pool School.
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    Re: Not maintaining fc level

    Thanks for the help, I've added to my signature & just ordered the tf100 test kit. I'll slam the pool once I know my cya levels.

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    Patrick_B's Avatar
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    Re: Not maintaining fc level

    Good for you, and welcome to the forum. Your pool life will be way different than it ever has been. You'll actually enjoy it and not be wondering what's going on.
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    Re: Not maintaining fc level

    Welcome and you will be amazed at how easy the TF 100 is to use and be able to easily maintain your pool.
    Lisa
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    Re: Not maintaining fc level

    Ok my test kit came in & results are Fc 4
    Cc 1
    Cya 50
    Ta 90
    Ph 7.4
    Recommendations? I work away from home & before I left for the week the fc was 5 came home 7 days later at 0.


    13500 gallon above ground with pentair sand dollar sand filter, 1.5hp pentair pump with TF-100 test kit. Kaplan, Louisiana

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    Smykowski's Avatar
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    Re: Not maintaining fc level

    With CC at 1 and FC at zero, you need to SLAM, the pool. CYA of 50 is about as high as you want to go for now, so take those pucks out.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    Re: Not maintaining fc level

    Ok, thanks. I'll start slamming this weekend without pucks


    13500 gallon above ground with pentair sand dollar sand filter, 1.5hp pentair pump with TF-100 test kit. Kaplan, Louisiana

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    Mod Squad YippeeSkippy's Avatar
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    Re: Not maintaining fc level

    Do you work away from home often? Perhaps down the road you might want to think about a salt water chlorine generator (SWG) to help keep some chlorine (but no CYA additions!) in your pool those few days you're gone.

    Yippee
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    Mod Squad pooldv's Avatar
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    Re: Not maintaining fc level

    Before you leave take your pool up to shock level for your CYA based in the Chlorine CYA Chart
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    Re: Not maintaining fc level

    Yes I work offshore on a 7/7 rotation (7 home then 7 gone)


    13500 gallon above ground with pentair sand dollar sand filter, 1.5hp pentair pump with TF-100 test kit. Kaplan, Louisiana

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