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Thread: SW pool with no CY reading Problem or Not?

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    divepool's Avatar
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    Aug 2008
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    St. Charles IL
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    SW pool with no CY reading Problem or Not?

    I have a SW pool 56000 gal (no typo) My FC 3, PH 7.5, calcium 160, CY 0. salt at 2900ppm, Pool is crystal clear no problems, Question is do I need to add stabilizer to bring CY up? I have not added any Algaecide, Clarifier or anything this year, opened pool and added 6gal of pool shock and 2 1/2 gal of muratic acid to lower PH from 7.8 to 7.5. All I ever add is muratic acid to keep PH in check. Any help would be great.

    Rich
    22x52 IG 56K gal 3.6' to 11.6' deep, TruTile w/Vinyl Liner IG pool w/ 12" wide safety ledge
    StaRite System 3 Cartridge filter 450sqft S8M450, Pentair IntelliFlo VF pump 3.2KW
    Hydronic in floor heat & StaRite SR400HD, Pro Logic PS16 w/2 40K Turbo cells.
    4 Hayward Colorlogic lights, Dolphin DL3002 Robotic cleaner
    Saint Charles, IL

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: SW pool with no CY reading Problem or Not?

    Is this a commercial pool? There are often regulations that restrict what you can do in commercial pools.

    For a residential pool I would raise CYA up to between 70 and 80.
    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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    divepool's Avatar
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    Aug 2008
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    St. Charles IL
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    Re: SW pool with no CY reading Problem or Not?

    No this is a residential pool. I will go home tonight and figure out the lbs to add to get to 70/80 cya

    Thank you
    22x52 IG 56K gal 3.6' to 11.6' deep, TruTile w/Vinyl Liner IG pool w/ 12" wide safety ledge
    StaRite System 3 Cartridge filter 450sqft S8M450, Pentair IntelliFlo VF pump 3.2KW
    Hydronic in floor heat & StaRite SR400HD, Pro Logic PS16 w/2 40K Turbo cells.
    4 Hayward Colorlogic lights, Dolphin DL3002 Robotic cleaner
    Saint Charles, IL

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    guamguy's Avatar
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    Feb 2010
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    Guam, USA
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    Re: SW pool with no CY reading Problem or Not?

    WOW That's one BIG pool!
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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