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Thread: Chemical levels

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    Mokena, IL
    Posts
    3

    Chemical levels

    Hi new to the site and just received my TF-100 Kit and here are my results
    PH=7.5
    TA=190
    Clac=450ppm
    CYA=50
    FC=2ppm
    CC=.5

    It looks like my TA is hi but I have a pool heater which I know tends to lower this so do I need to adjust this or not? Anything else off? I use 3" chlorine tabs but I see from the site that I should use household bleach. I appreciate your comments and feedback.
    Thanks
    AG vinyl 27' dia pool 17,100 gallons - cartridge filter 2hp pump - Hayward gas heater model H-2001(200,000BTU) - TF-100 Test Kit - Trees around - Mokena,IL

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Chemical levels

    Welcome!

    I see fairly high CH, which could be from living in a hard water area, or the pool store could have been pushing buckets of Cal-hypo "shock" on you. You can't do much about the fill water, but you can stop using powdered forms of Chlorine. Whatever tablets are there, let 'em dissolve and don't add anymore. CYA is already at a good level. Don't worry, they'll keep for years if you keep them dry. Save them for vacation.

    The heater won't do anything to the alkalinity but warm it. A spa or a waterfall will drive the pH up and when you lower pH with acid, TA also comes down.

    The only thing that needs immediate attention is the low FC level. You should never let FC slip below 4 with a CYA of 50. You should target something like 7 or 8 when you add bleach. Right now, it looks like one full 121 oz jug of Clorox 8.25% bleach will get you to 7.

    When the pucks stop dissolving, expect to see the pH rise a whole lot faster than it has been. When it gets to 7.8, add acid to get it down to 7.2. That should lower TA over time without you having to take any aggressive steps.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    May 2014
    Location
    Mokena, IL
    Posts
    3

    Re: Chemical levels

    Thanks!!
    AG vinyl 27' dia pool 17,100 gallons - cartridge filter 2hp pump - Hayward gas heater model H-2001(200,000BTU) - TF-100 Test Kit - Trees around - Mokena,IL

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