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Thread: high clorine level

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    high clorine level

    after having the pool covered for a couple of days the Chlorine Drop test was off the chart (dark yellow). We have had the SWG off for several days but the Chlorine is still off the chart. The water looks great but should we be concerned? Should we do something to lower the level?
    Central PA, 22500 gall IG, vinyl, Pentair Intelli-Flow variable speed pump, sand filter, Pentair Intelli-Clor SWG

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    Join Date
    Aug 2010
    Dallas, TX

    Re: high clorine level

    It should be coming down on its own. You might consider getting a FAS-DPD chlorine test so you can accurately test your TC at high levels. ... t-p47.html
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: high clorine level

    Also realize that the OTO test measures TC (total chlorine = FC + CC). So, it could look high because of high CC (not good).

    Since your water sounds clear, that is less likely, but another reason to invest in a good test kit.
    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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  4. Back To Top    #4
    elwood58's Avatar
    Join Date
    May 2012
    Sun City West Arizona (2nd Home)

    Re: high clorine level

    Take the cover off and let some sunlight get to the chlorine.
    14100 Gal IG MiniPebble, Pentair Intellichlor IC-40 SWG, Sand Filter, Pop Up Cleaning, Intelliflo VS Pump, Aquacal Heatpump/Chiller, 1/4 Acre Desert Landscaped, Lots of Deck. Built in 1984, updated in 2012 and 2014
    "If you don't measure it, you can't manage it!"

  5. Back To Top    #5

    Join Date
    Jun 2010
    Glendale, CA

    Re: high clorine level

    As mentioned - taking the cover off will speed up the break down of chlorine fairly rapidly.

    One thing to keep in mind - your idea of "very high chlorine" isn't taking CYA into account. A very yellow OTO test (10-15ppm) is most likely somewhere below the correct shock level for your pool - but it all depends on the CYA level. If you know your CYA level post it and we can help you get a sense of how "high" your chlorine levels actually were/are.

    There is a lot of great information in Pool School about the CYA/FC relationship and how it works.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  6. Back To Top    #6

    Join Date
    Feb 2008
    Flower Mound, TX

    Re: high clorine level

    What is your CYA level? Without knowing that, you aren't able to know what your chlorine level needs to be.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

  7. Back To Top    #7

    Re: high clorine level

    Sorry guys, as soon as I sent the post I knew I should have included more info.
    We do test using a T-100 kit. A couple days ago the numbers were:
    FC - 13
    CC - 0
    CYA - 65

    Thanks again for any input. This is our first season with the pool so we are definitely newbies at this.
    Central PA, 22500 gall IG, vinyl, Pentair Intelli-Flow variable speed pump, sand filter, Pentair Intelli-Clor SWG

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