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Thread: First week chlorine levels with SWG

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    Scuba_Steve's Avatar
    Join Date
    May 2015
    Pooler, GA

    Question First week chlorine levels with SWG


    I would like to start swimming immediately once my pool is full if I can.

    I plan on having a tap water day once it is full and then test and add chemicals that first evening to bring it somewhat close to ideal parameters. I'll probably keep everyone out the next day, and on day 3 add salt and have a diamond party. Day 4 my SWG will turn on for the first time.

    My question is, what should I be doing with chlorine over these days. I am going to add enough cya to bring my level up to 70 on the eve of day 1, but I know it takes a week to dissolve.

    I assume it will go up fairly linear.
    0 day 1,
    10 day 2,
    20 day 3, etc.

    Should I be matching my chlorine to this using the target fc on the best guess chart? That is up until my chlorine is at 5, then let the SWG take over trying to keep it at 5.

    day 1 TC 2ppm cya 0 adjust ph add cya,
    day 2 TC 2ppm cya 10,
    day 3 TC 3ppm cya 20 salt added,
    day 4 TC 4ppm cya 30 SWG on,
    day 5 TC 5ppm cya 40,
    day 6 TC 5ppm cya 50,
    day 7 TC 5ppm cya 60,
    day 8 TC 5ppm cya 70,
    day 9 start fine tuning.

    This sound like a good plan?
    6425g Intex Ultraframe 18'x48" AG
    Stock 1500gph cartridge filter / Intex SWG CG-28669 with E.C.O.
    Install date: 5/26/2015
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  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: First week chlorine levels with SWG

    If you add enough CYA to target 70, assume the CYA is at 70 right from the start. I would target 50 or 60 to start, verify actual after a week, then adjust CYA/FC from there.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: First week chlorine levels with SWG

    The CYA will not likely rise linearly like that. I think it is more front loaded.

    As soon as it starts dissolving, just raise the FC level up to keep it above the minimum for the non-SWG pool.

    There really is no reason to keep people out of the pool.
    Jason, TFP Moderator
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