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Thread: NO residual Chlorine

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    NO residual Chlorine

    So the last few nights after using the hot tub, i've added roughly 2 oz of 10.6% liquid chlorine per person (roughly stayed in 1/2 hour). the next night before using, i check and seems chlorine is done to 0. I add about 2.5 oz (~475 gallon tub) prior to use so as to bring up chlorine.

    Last night 15 min prior to use i added the 2.5oz of liquid chlorine and 22ml of MPS. Then again after use added 2 oz per person.

    6 people in tub.

    So i will be interested tonight to see if there is any residual chlorine.


    it is a brand new tub, only used 3 nights now. Used Ahh-some prior to setup, so everything should be clean.

    Added Spa Marvel as well, so thought that would perhaps assist in not using up the chlorine as quick.

    Hoped there would be at least 1 ppm of chlorine left.
    Located in Ottawa, Ontario Canada
    23K Gal, AG, Cart filter, 1.5hp 2speed hay PowerFlo Matrix, Install Sum'13, Aquatrol SWG, Solarbear panels, kreepy Krauly E-Z Vac, TF-100
    Artesian ~500gal Grand Gayman Island Spa

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    Mod Squad pooldv's Avatar
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    Re: NO residual Chlorine

    There is a bit of a learning curve on what the person hour demand is for chlorine in your tub. And it varies depending on how much "products" the person uses. I prefer to retest once or twice and hour or two or three after dosing bleach to make sure there is FC left in the tub. I often have to add more.

    Have you memorized this page yet?
    How do I use Chlorine in my Spa (or pool)?
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    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: NO residual Chlorine

    Quote Originally Posted by pooldv View Post
    There is a bit of a learning curve on what the person hour demand is for chlorine in your tub. And it varies depending on how much "products" the person uses. I prefer to retest once or twice and hour or two or three after dosing bleach to make sure there is FC left in the tub. I often have to add more.

    Have you memorized this page yet?
    How do I use Chlorine in my Spa (or pool)?
    No my memory is Bad.....

    Now that it is the weekend, i will have more time to check level frequently after use and get idea how much is used. Maybe my chlorine is week since i bought it in Apr
    Located in Ottawa, Ontario Canada
    23K Gal, AG, Cart filter, 1.5hp 2speed hay PowerFlo Matrix, Install Sum'13, Aquatrol SWG, Solarbear panels, kreepy Krauly E-Z Vac, TF-100
    Artesian ~500gal Grand Gayman Island Spa

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    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
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    23,999

    Re: NO residual Chlorine

    Could be, especially if stored outside. Yeah, I've read that 30 or 40 times and still have to check it sometimes.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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