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Thread: Not Enough Chlorine Produced

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    Not Enough Chlorine Produced

    Our pool at our families vacation house isn't producing enough chlorine.

    I tested it and it's coming up 0.5 FC. The SWG is running at 100% for the last 1.5 days. The pool is 100% balanced otherwise. Salt level is 3000 ppm.

    Any thoughts?

    -
    18,000 gal fiberglass pool
    Pentair IC40 SWG
    Pentair MasterTemp
    TF-100 Test Kit
    18x36 29K gal Gunite - 1 HP Hayward Super Pump
    Hayward Aqua Rite - 40k Cell - 24" Hayward Pro Sand Filter
    Polaris 380 w/ booster - RayPak 336K BTU Propane Heater

    Twitter: @jfgreco

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    Jezza's Avatar
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    Re: Not Enough Chlorine Produced

    Yes- can you give us the full results

    FC
    CC
    pH
    TA
    CH
    CYA

    How long are you running your your SWG for at 100%?
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,
    K-2006

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    Mod Squad tim5055's Avatar
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    Re: Not Enough Chlorine Produced

    First, add liquid chlorine to gets it to where it should be.

    Any lights on at the salt cell? Is the salt level OK?

    My next step would be to conduct an OCLT to see if something in the water is consuming all chlorine produced.
    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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    Not Enough Chlorine Produced

    Here you go.

    FC-0.5
    CC-0
    pH-7.2
    TA-90
    CH-310
    CYA-80
    Salt-3000

    How long are you running your your SWG for at 100%? We are running it for 11 hours a day.

    I took a sample right out of the inlet and that was 2 ppm.

    It is consistently 0.5.

    Salt cell has all the proper lights on.


    18x36 29K gal Gunite - 1 HP Hayward Super Pump
    Hayward Aqua Rite - 40k Cell - 24" Hayward Pro Sand Filter
    Polaris 380 w/ booster - RayPak 336K BTU Propane Heater

    Twitter: @jfgreco

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    Jezza's Avatar
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    Re: Not Enough Chlorine Produced

    OK- you are definitely running too low for your CYA of 80.

    I would follow up with the OCLT tonight to confirm the presence of organics and prepare for a possible SLAM. You could consider using liquid chlorine to bring your FC up to 10 FC to get a solid number for the OCLT.
    11 000 gallons, IG, Fibreglass, Monarch Sand Filter, Davey Typhoon C100M 1HP pump, Davey Chloromatic Mc16CTO ESR SWG, Davey Pool Wall Climba Robot, Daisy Solar Cover,
    K-2006

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    GreatCanadian's Avatar
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    Re: Not Enough Chlorine Produced

    If your SWG is working properly then you likely have organics. I believe you might be on the very edge of a full blown algae bloom, and the SWG is producing just barely enough to keep it at bay - for now. As suggested above use bleach and get your FC level up to where it should be. Perform an OCLT.

    GC
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

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    Mod Squad tim5055's Avatar
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    Re: Not Enough Chlorine Produced

    Yes, if you tested 2ppm at the return then the FC is being being consumed by organics. Verify with an OCLT, but it's time to SLAM.
    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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    Re: Not Enough Chlorine Produced

    We began slamming yesterday. We lost some overnight so continuing to slam today. Pool looks a million times better.

    Any tips on helping chlorine drop once we pass the OCLT?


    18x36 29K gal Gunite - 1 HP Hayward Super Pump
    Hayward Aqua Rite - 40k Cell - 24" Hayward Pro Sand Filter
    Polaris 380 w/ booster - RayPak 336K BTU Propane Heater

    Twitter: @jfgreco

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    Mod Squad pooldv's Avatar
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    Re: Not Enough Chlorine Produced

    FC will drop on its own pretty quickly. It is safe to swim up to shock level for your CYA, FC/CYA Chart
    TFP Moderator
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    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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