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Thread: Converting back to saltwater

  1. #1
    Junior Member
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    Jun 2012
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    Converting back to saltwater

    I've recently moved into a house that a friend inherited and the pool has a swg system already installed. The pool guy inexplicably started using liquid chlorine in the pool and shut off the swg system. So the pool has been lc for over a year now. We want to revert it back to using the swg and have a question:

    1. Do we need to empty the pool and refill it before turning the swg back on?

    Is there anything else we should do?

  2. #2
    Mod Squad Butterfly's Avatar
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    May 2007
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    Re: Converting back to saltwater

    Welcome to the forum

    A SWG pool is a chlorine pool. Just the method of introducing the chlorine is different.

    Post a full set of test results, tell us how you got them, & we'll help you get balanced.

    We need:
    FC
    CC
    pH
    TA
    CH
    CYA
    Salt
    Borates (if you use borates)
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ Do not use a sledge hammer to swat a mosquito. ~

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  3. #3
    Senior Member blakej's Avatar
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    Re: Converting back to saltwater

    You should not need to empty the pool before you turn your SWG back on. A SWG (or more accurately SWCG) stands for Salt Water Chlorine Generator. You are still sanitizing the pool with chlorine..just a different method of creating/adding it.

    Do you have a good test kit? If so, please post results and we can let you know if anything else should be done.

    PS Welcome to TFP!

  4. #4
    Senior Member elwood58's Avatar
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    Re: Converting back to saltwater

    You will likely need to add some salt. Assuming the SWG was working when shut off, you should be good to go, with maybe a Salt Cell cleaning for good measure.
    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. #5
    Mod Squad woodyp's Avatar
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    Re: Converting back to saltwater

    Different brands of SWG require different levels of salt. TEST your pool BEFORE adding any too!
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
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