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Thread: Way too high chlorine level and staying that way for weeks

  1. Back To Top    #21

    Join Date
    May 2018
    Location
    San Jose, CA
    Posts
    8

    Re: Way too high chlorine level and staying that way for weeks

    Here is the test results using the TF-100 kit. Looking forward to tips and next steps. Thanks!

    pH = 7.6
    Chlorine Drop Test = 7.5
    Combined Chloramines = 0
    Total Chlorine = 7.5
    Calcium = 700 ppm
    Total Alkalinity = 100
    CYA = 120

    Below is the results from Leslie's Pool Store Test
    Free Available Chlorine = 10 ppm
    Total Available Chlorine = 10 ppm
    Calcium Hardness = 670 ppm
    Cyanuric Acid = 120 ppm
    Total Alkalinity = 100 ppm
    pH = 7.4
    Copper = 0
    Iron = 0
    Total Dissolved Solids = 1050
    Phosphates = 50

  2. Back To Top    #22


    TFP Guide
    ajw22's Avatar
    Join Date
    Jul 2013
    Location
    Northern NJ
    Posts
    2,325

    Re: Way too high chlorine level and staying that way for weeks

    With your CYA over 100 did you do Step 8 at Pool School - CYA and dilute the pool water by 50% for the test?

    If your CYA level is 90 or higher, repeat the test adjusting the procedure as follows:
    Fill the mixing bottle to the lower mark with pool water.
    Continue filling the mixing bottle to the upper mark with tap water.
    Shake briefly to mix.
    Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark.
    Continue the test normally from step 2, but multiply the final result by two.
    -Allen
    IG 20x50 35,000 gal Cayman Lagoon Hydrazoo plaster w/ spa & waterfall, Pentair Intellichlor SWG, Pentair Mastertemp 400BTU Nat Gas Heater, Pentair FNS Plus 60 DE Filter, Polaris 380 cleaner, Meyco solid winter cover, TF100 Test Kit, Built in 2000 & replastered in 2017

  3. Back To Top    #23

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    31,199

    Re: Way too high chlorine level and staying that way for weeks

    Your test results (not Leslies, please don't use them) look valid and indicate a need to drain some water to make your pool easier to manage.

    I would suggest you drain and refill 1/3 of your pool water (not an inch or two like many do) and retest at the end of that process and post your results. When you retest, please test the CH of your fill water and post that as well.

    Please keep your FC right around 7.5 ppm for now. Use liquid chlorine to maintain that level.....no more pucks
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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