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Thread: What are the negatives about SWG pool systems?

  1. Back To Top    #1

    Join Date
    Jun 2012
    Location
    Barrie, Ontario, Canada
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    28

    What are the negatives about SWG pool systems?

    I bought a house that has a SWG system in the pool.
    I know the benefits of the system over chlorine types, but I can't seem to find any negatives, mainly relating to the parts of the pool, ie: pump, filter, water likes, liner, etc. the only negative I found about the SWG systems is that it really eats away at the heater (which I found out the hard way)

    I know that they are more expensive then chlorine systems as far as hardware, and replacing parts go, but I have tried searching high and low about the mega rice about the system on the different part of the pool.

    If anyone has a link or more info, that would be greatly appreciated.

    Thanks
    Size - 50,000 Litres / 13,208 g (32' x 16' x 4.5' Sport Pool)
    Filter - Jandy CL460 Cartridge Filter
    Salt Water - Zodiak LM2
    Pump - Jacuzzi Magnum Force
    Heater - Laars LT LT250NS-C
    IG Pool (Vinyl)
    2003-2005 ish

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    linen's Avatar
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    Jul 2010
    Location
    Twin Cities, MN
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    Re: What are the negatives about SWG pool systems?

    Some more potential negatives that I can think of:

    • SWG cause a steady rise in ph, though this can be minimized by lowering TA.
      The salt water can be a problem for soft stonework.
      Improper metals or improperly treated metals near/at the pool may rust.
      Cell needs to be replaced (3-5 years typically).
      Some people can taste the salt and some of those do not like it.
      Since swgs run best at higher cya levels, if an algae outbreak occurs (less common), then it take more chlorine to get rid of it.
      Ease/automation of swg use can lure the person in charge of pool maintenance into testing less often then needed, and that can lead to problems.
      Steeper learning curve compared to bleach/liquid chlorine use (imo).


    With that said, I like my swg
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  3. Back To Top    #3

    Join Date
    Jun 2012
    Location
    Barrie, Ontario, Canada
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    Re: What are the negatives about SWG pool systems?

    Thanks for all of that, I can handle all of those things (except for perhaps the $500 cells every 4 or so years :s).
    Bit when it comes to the liner or pipes, does the salt eat away at those anymore than regular chlorine pools?
    Size - 50,000 Litres / 13,208 g (32' x 16' x 4.5' Sport Pool)
    Filter - Jandy CL460 Cartridge Filter
    Salt Water - Zodiak LM2
    Pump - Jacuzzi Magnum Force
    Heater - Laars LT LT250NS-C
    IG Pool (Vinyl)
    2003-2005 ish

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: What are the negatives about SWG pool systems?

    No, there is no risk to the liner, pipes, pump, filter, heater, etc from salt at the usual SWG levels. Only the metal frame of the pool (if your frame is metal) is at any risk, and having problems there is highly unusual. I'm not sure why you think there is danger for the heater, heaters are only really at risk from low PH or ocean water salt levels, not SWG salt levels.
    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

  5. Back To Top    #5

    Join Date
    Jun 2012
    Location
    Barrie, Ontario, Canada
    Posts
    28

    Re: What are the negatives about SWG pool systems?

    Multiple people have told me that the salt eats away at the inners of the heater, the old owner told me he has never had any problems with the pool, levels have never been an issue, except for the heater, it is all rusted out on the insides and I've heard that heaters only last for 5 years on a salt water pool.
    Size - 50,000 Litres / 13,208 g (32' x 16' x 4.5' Sport Pool)
    Filter - Jandy CL460 Cartridge Filter
    Salt Water - Zodiak LM2
    Pump - Jacuzzi Magnum Force
    Heater - Laars LT LT250NS-C
    IG Pool (Vinyl)
    2003-2005 ish

  6. Back To Top    #6
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: What are the negatives about SWG pool systems?

    Nearly all heater damage that occurs is from low PH. We have never had a member who ever had any actual damage to their heater from using salt. There have been a couple of third hand stories passed around, but none of them were accompanied by enough information to evaluate.
    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

  7. Back To Top    #7

    Join Date
    Apr 2011
    Location
    Warner Robins, GA
    Posts
    245

    Re: What are the negatives about SWG pool systems?

    In addition because of what Jason said above, most high end heaters are now titanium heater cores which eliminate that issue.
    16 x 32 Grecian Vinyl. Salt-Aqua Plus PS-4, Hayward Pro Series Sand Filter, Hayward Ecostar SP34000vsp, Gulfstream HE-125-T-A Heat/Cool heat Pump

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