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Thread: SWG Just Started

  1. Back To Top    #1

    Join Date
    Sep 2013
    Location
    Bettendorf, IA
    Posts
    31

    SWG Just Started

    Our SWG was just started yesterday and I am little confused about the recommended levels.

    The water balance for SWG suggests the following levels:

    Salt: ~3,000
    CYA: 70-80
    FC: 3-5
    TA: 60-80
    pH: 7.5-7.6

    Here are my current readings:
    CYA: 40
    FC: 4.5
    TA: 110
    CH: 100
    pH: 7.8
    Salt: 2,800

    So from the looks of it, I need to add some salt and CYA to raise those levels. I also need to lower pH and TA. However the guidance for lowering TA suggests only doing it if I see signs of scaling or if I'm having trouble with pH. I have neither. Should I still go through the practice to lower TA for SWG purposes?

    Thanks all.
    20x46 Rectangle IG Vinyl, Completion date mid-June 2014
    Depth 3'-3.5'-8', ~35,000 gallons, Hayward 310 Sand Filter, Hayward 1.5 hp single speed pump, ProLogic PS4 Automation w/ SWG
    Textured liner over corner stairs w/ 20' bench, 2 LED Lights, 2 Pentair Laminar Jets, Hayward Sharkvac and TF-100 Testkit

  2. Back To Top    #2

    Join Date
    Oct 2013
    Location
    Chapin, SC
    Posts
    1,141

    Re: SWG Just Started

    Have you tested your fill water? My fill water is 140. I'd put some more salt in, get your cya up too and Rev it up! Oh! What does your swg manual say your swg should have for salt level? What are the levels for when the swg will stop generating for low or high salt. What salt level is optimum?
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: SWG Just Started

    I wouldn't bother with lowering TA right away. Just lower the PH to 7.2 each time it gets to 7.8 until the TA comes down to the recommended level. If you do that your TA will come down very slowly, which is fine as long as the rate at which PH increases doesn't bother you.
    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

  4. Back To Top    #4

    Join Date
    Sep 2013
    Location
    Bettendorf, IA
    Posts
    31

    Re: SWG Just Started

    I haven't gone through the steps to lower my TA, thanks for the advice. I did add some more salt; we are at 3,100ppm now, that being said, I am having a hard time lowering my pH. It seems to go down to 7.5 for awhile then the next day jumps up to 7.8 or higher. My FC seems to be doing fine, around 4-5 every night, so not too high but pH seems to jump rather quickly. I haven't done the DPD-FAS chlorine test in a few days, so relying on the TF-100 daily chlorine color test but seems to be the same color each night.

    Our pool was just finished a month ago and it came with a "set" of chemicals to get me by, so I've been using the sodium bisulfate included. Should I jump to the muriatic acid or finish out attempting the pH reducer? Could there be something else that is causing pH to jump?
    20x46 Rectangle IG Vinyl, Completion date mid-June 2014
    Depth 3'-3.5'-8', ~35,000 gallons, Hayward 310 Sand Filter, Hayward 1.5 hp single speed pump, ProLogic PS4 Automation w/ SWG
    Textured liner over corner stairs w/ 20' bench, 2 LED Lights, 2 Pentair Laminar Jets, Hayward Sharkvac and TF-100 Testkit

  5. Back To Top    #5
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: SWG Just Started

    High TA and/or low PH plus aeration raise the PH. The SWG provides the aeration. That is probably all that is going on.

    Muriatic acid is much less expensive and better for the pool, but it is mildly more difficult to handle.
    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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