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Thread: First year that is has salt level low

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    kenmacboston's Avatar
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    First year that is has salt level low

    Mine may be not working as well. First year that is has salt level low. I notice that my "free chlorine" has always been 0 since I installed the SWG. Is this normal, does anyone know?
    Ken Macumber
    18,000 Gunite, salt system, 250K BTU Hayward Heater, Waterfall, Fiber Optic Perimeter Lighting.
    20 yrs pool veteran

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    Mod Squad Bama Rambler's Avatar
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    Re: SWG dying?

    How old is your cell?
    Have you cleaned your cell lately?

    It's not normal to have zero FC. You need to add chlorine manually until you figure this out.
    Dave J. TFP Moderator
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    kenmacboston's Avatar
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    Re: First year that is has salt level low

    I installed the SWG in 2004. When I took my water sample to Leslie's they said that with a salt system the free chlorine would be zero. I thought that to be odd. I clean the SWG unit frequently (I take excellent care of the pool and pool equipment). I have had no real problems with the pool, water, corrosion, etc since I built the pool in April 2004. Thanks for your feedback.
    Ken Macumber
    18,000 Gunite, salt system, 250K BTU Hayward Heater, Waterfall, Fiber Optic Perimeter Lighting.
    20 yrs pool veteran

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    Mod Squad jblizzle's Avatar
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    Re: First year that is has salt level low

    Generally we see salt cells having a life of 3-5 years. You apparently got a good one if it has lasted 8

    Is the system saying low salt? Have you measured the salt level independently? If you confirm that the SWG is measuring significantly lower than your test, that is a typical sign of a failing cell. Many pool stores can test the cell for you.

    FC should not be zero ... especially if you take the water directly from a return.

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    Jason, TFP Moderator
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    Mod Squad Bama Rambler's Avatar
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    Re: First year that is has salt level low

    Leslies was completely wrong about that!! The FC should never be zero or even close. However, they are good for something. They can test the cell for you. Eight years is a long time for a cell to last.

    Go ahead and post a full set of test results you have from Leslies.
    Dave J. TFP Moderator
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    kenmacboston's Avatar
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    Re: First year that is has salt level low

    Went to Leslie's yesterday, the SWG is good, passed the test. They last longer here in New England probably because we have a shorter pool season (and my excellent maintenance practices...). Here are the water results:
    Free Chlorine .5
    Total Chlorine .5
    Salt 2300 (the unit read out as 2300 as well)
    Calcium Hardness 220
    Cyanuric Acid 20
    Total Alkalinity 50
    pH 8.0
    Phosphates 200

    Yesterday I added 80 lbs of salt (18,500 gal pool size) and it brought the salt to 3000. SWG seems to be working OK.
    Also added +-10 lbs of alkaline up

    Any other comments about things I should do? Water is still not quite clear, tint of green.

    Thanks to all for assistance.
    Ken Macumber
    18,000 Gunite, salt system, 250K BTU Hayward Heater, Waterfall, Fiber Optic Perimeter Lighting.
    20 yrs pool veteran

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    Mod Squad jblizzle's Avatar
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    Re: First year that is has salt level low

    Well, glad you just needed some salt.

    Your FC is still too low.

    You need to get your pH down some and not let it go over 7.8. Also note that the SWG will tend to make the pH rise (although with your low TA, that may help keep it lower too).

    You also should have your CYA up around 70ppm with SWG when you are in maintain mode.
    BUT ....
    since you are seeing green. You should probably go through the shock process with liquid chlorine BEFORE you raise your CYA ... (maybe even just turn the SWG off until you are cleared up). Start reading this:Turning Your Green Swamp Back into a Sparkling Oasis even though you may not have a full swamp.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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