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Thread: Greatly reduced %output setting - saving cell life

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    vanessadickson's Avatar
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    Greatly reduced %output setting - saving cell life

    Just wanted to share a little success I had with my SWG over the last few weeks. I had been running my SWG at 80% 24/7 just to hold 3-5ppm free chlorine. (no combined chlorine).

    I had let my CYA get down to 40, and my salt get down to 2700 (recommendations were about 60 and 3200, respectively).

    Then my inrush delimiter went out, and I replaced it, got my CYA up to 65, and salt up to 3200.

    With those 3 changes, I have been gradually reducing my %output settings down where I am now at 25% and holding chlorine at 8-9! Dont know which of the three changes gave me this ability to make less use of the salt cell, but sure will save on my salt cells life!
    38,900 gal., UG, vinyl, SWG, Hayward w/T-15, 1.0HP pump, sand filter, Aquabot Turbo-T

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    pwrstrk's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    Good job !! Just says what the proper levels can do for you.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    JasonLion's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    The increased CYA level would account for nearly all of the change. We recommend CYA between 70 and 80 with a SWG.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    vanessadickson's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    I wondered about that Jason, it says 70-80 on the calculator itself, yes, but when you click the CYA link look what it says......"swg ... between 60-80". Kinda internally inconsistent, but I decided to stay a bit on the low end for now since I have no problems. Do you think I should tweek up to 70?


    Here's the link---

    "Return to The Pool Calculator.

    CYA - Cyanuric Acid

    Cyanuric acid, often called stabilizer or sometimes conditioner, both protects FC from sunlight and lowers the effective strength of the FC. The higher your CYA level, the more FC you need to get the same effect. It is important to know your CYA level so you can figure out what FC level to aim for. If you don't have a SWG or problems from extremely high amounts of sunlight, CYA is typically kept between 30 and 50. If you have a SWG or very high levels of direct sunlight, CYA is typically kept between 60 and 80. If you are using an ORP controller, keep CYA below 50."
    38,900 gal., UG, vinyl, SWG, Hayward w/T-15, 1.0HP pump, sand filter, Aquabot Turbo-T

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    vanessadickson's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    Forgot to post my levels

    Al 70
    Cal 220
    Free cl. 9
    CC 0
    CYA 65
    pH 7.5
    38,900 gal., UG, vinyl, SWG, Hayward w/T-15, 1.0HP pump, sand filter, Aquabot Turbo-T

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    JasonLion's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    Bringing CYA up to 70-80 will allow you to lower the percentage setting further, increase cell life, reduce PH drift, etc. It will also allow CYA to still be reasonable towards the end of the season (CYA drifts down slowly over time).

    The Pool Calculator has not been updated in years and years and is no longer in line with our most recent recommendations.

    Of course, there is no real need to micro-manage. 65 is quite close and you don't need to worry about CYA till later (when it comes down) unless you want too.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    vanessadickson's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    Makes great sense Jason, thanks. I like to tweak a little now and be done with it for a while.
    38,900 gal., UG, vinyl, SWG, Hayward w/T-15, 1.0HP pump, sand filter, Aquabot Turbo-T

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    vanessadickson's Avatar
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    Re: Greatly reduced %output setting - saving cell life

    Well as usual Jason, you were so right---tweeked up to 75 CYA and need only be at 10-15% setting (depending on sun) to hold chlorine over 6.

    Advice here never off base. Thanks guys!! Having s crystal pool with very little work all summer is awesome!
    38,900 gal., UG, vinyl, SWG, Hayward w/T-15, 1.0HP pump, sand filter, Aquabot Turbo-T

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