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Thread: SWG Questions

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    SWG Questions

    I'm getting some bids to build my pool and have a few questions about SWG's.
    I've read all the negatives regarding the Nature2 units (the cooper it puts into the pool) but one builder is telling me that the nature2/SWG is a better unit (just don't use the mineral cartidge) than getting a stand alone Jandy SWG? Is there any truth to this? He's telling me it is actually cheaper as well compared to the stand alone?
    Also, do I need to get a puck chlorinator (rainbow 320) to help out when the SWG doesn't work in the winter? Is there any problem getting the rainbow unit and only using it as a back up?
    33'x21' In-ground (23,000 gal) - 8' spa raised 18" with 8 jets | Filtration Jandy DE 60 | Sanitation Aquapure 1400 SWG | Pumps Intelliflo VS+SVRS 3.0HP & Jandy 1.5HP stealth water feature pump | Heating Jandy LRZ400 | Lighting Jandy LED Spa (1)/Pool (2) | Coping Tennessee Crab Orchard & Moss Rock | Finish pebble sheen type (riversand) Tahoe Blue

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    JasonLion's Avatar
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    Re: SWG Questions

    The nature2/SWG combo units tend to be undersized compared to other brands that claim support for the same size pool. Other than that they have about the same chance of problems as other units. My assumption is that the builder is pushing it because of their profit is higher on that unit, not because of what actually works better, but you never know.

    There is no need for a puck feeder, but it can be handy to have one occasionally. They don't get in the way when you aren't using them.
    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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    Re: SWG Questions

    Interjecting dumb question here... why wouldn't a SWG work in the winter?

    I can see that maybe the filter won't run much in the winter but then you have to have circulation for the puck chlorinator as well.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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    mas985's Avatar
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    Re: SWG Questions

    Most SWGs will have an automatic shut off at a certain temperature. Mine shuts off at 50 degrees but I have found that algae doesn't grow when the water is that cold so I don't bother with adding chlorine. But then again, the water doesn't usually stay below 50 for more than a week or two and it is at a time of year when chlorine extinction is very low so there may be some carry over.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: SWG Questions

    For the situation that I will be in. I will still need someway to sanitize the spa in the winter? How can I do that with a SWG that turns off?
    33'x21' In-ground (23,000 gal) - 8' spa raised 18" with 8 jets | Filtration Jandy DE 60 | Sanitation Aquapure 1400 SWG | Pumps Intelliflo VS+SVRS 3.0HP & Jandy 1.5HP stealth water feature pump | Heating Jandy LRZ400 | Lighting Jandy LED Spa (1)/Pool (2) | Coping Tennessee Crab Orchard & Moss Rock | Finish pebble sheen type (riversand) Tahoe Blue

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    XsAllOverIt's Avatar
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    Re: SWG Questions

    I winterize my pool and use my attached hot tub all winter. I use chlorine during the winter. Normally, an SWG in that situation won't be your solution. Even running at 10%, it is made to chlorinate your pool and chlorine levels will be too high with the SWG running unless you turn it off/unplug it for the majority of the day. I find adding 1 cup of chlorine in my 600 gallon hot tub about 2-3 times per week to be a no-brainer.
    18 x 36 Inground Gunnite, White Plaster 21K gallon
    18" raised spa, 8' Diameter (620 gallon)
    Triton II Sand filter, Intellichlor IC40 SWG
    Pentair Pump, Max-E-Therm 400 BTU
    Lamotte ColorQ PRO 7-Plus test kit
    TFT-100 test kit

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    mas985's Avatar
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    Re: SWG Questions

    Quote Originally Posted by msujohn
    For the situation that I will be in. I will still need someway to sanitize the spa in the winter? How can I do that with a SWG that turns off?
    You will need some chlorine when you decide to use the spa but I would assume that you turn on the heat when running the spa, correct? That will heat the water and the SWG will then turn on and you will get plenty of chlorine in the SPA while it heats. But your water may not ever get cold enough to shut off the SWG anyway.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    XsAllOverIt's Avatar
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    Re: SWG Questions

    Quote Originally Posted by mas985
    Quote Originally Posted by msujohn
    That will heat the water and the SWG will then turn on and you will get plenty of chlorine in the SPA while it heats. But your water may not ever get cold enough to shut off the SWG anyway.
    Just remember your SWG is made for the entire volume of the pool and spa, so your chlorine levels may get WAY TOO HIGH if you use it full-time. As I said, it's much easier to disconnect the SWG during the winter and use small amounts of Clorox.
    18 x 36 Inground Gunnite, White Plaster 21K gallon
    18" raised spa, 8' Diameter (620 gallon)
    Triton II Sand filter, Intellichlor IC40 SWG
    Pentair Pump, Max-E-Therm 400 BTU
    Lamotte ColorQ PRO 7-Plus test kit
    TFT-100 test kit

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    mas985's Avatar
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    Re: SWG Questions

    My SWG controller (and most others) have two modes, one for the pool and one for the spa so when in spa mode, the % setting is lower and won't add too much chlorine. With a spa, I would make sure any SWG that you are looking at has this capability.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Join Date
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    Re: SWG Questions

    Thanks for all the advice. I will have to see if my SWG will have a SPA only mode. Otherwise, I can just use the chlorine option.
    33'x21' In-ground (23,000 gal) - 8' spa raised 18" with 8 jets | Filtration Jandy DE 60 | Sanitation Aquapure 1400 SWG | Pumps Intelliflo VS+SVRS 3.0HP & Jandy 1.5HP stealth water feature pump | Heating Jandy LRZ400 | Lighting Jandy LED Spa (1)/Pool (2) | Coping Tennessee Crab Orchard & Moss Rock | Finish pebble sheen type (riversand) Tahoe Blue

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