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Thread: Need help with SW IG pool water balancing

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    Need help with SW IG pool water balancing

    Hi,
    I have a vinyl lined 28k gal SW IG pool. I just got my test kit today. I have not been able to raise my Chlorine level. I would like to share my numbers and get some advice on what to do. Someone told me that Phosphates can deplete Chlorine, so I tested for that too.
    Here are my readings:
    Free Chlorine: .19
    Total Chlorine: 3.61
    PH: 7.3
    Total Alk: 104
    Calcium Hardness: 324
    CYA: 55
    Phosphates: 1,000+ ppb (the test does not measure ppm)
    Nitrates - Not tested. Should I buy a test kit for them?
    19,000 gallons
    Cartridge filter
    IG vinyl, Propane heater
    SWG, 2006 Taylor Test Kit

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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: Need help with SW IG pool water balancing

    Your CC level is around 3.4, CC = TC - FC, so you need to shock the pool. That may well take substantial amounts of chlorine, or maybe not. It is impossible to say just how much. See this article for details.
    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: Need help with SW IG pool water balancing

    Quote Originally Posted by JasonLion
    Your CC level is around 3.4, CC = TC - FC, so you need to shock the pool. That may well take substantial amounts of chlorine, or maybe not. It is impossible to say just how much. See this article for details.

    Thanks for your quick reply, and the link. I will read the article. Can you recommend a product to remove the Phosphates? Do you think that shocking, and removing the Phosphates will allow my Free Chlorine to increase? Should I remove the Phosphates 1st? Do you think I should up my CYA?
    19,000 gallons
    Cartridge filter
    IG vinyl, Propane heater
    SWG, 2006 Taylor Test Kit

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

    Re: Need help with SW IG pool water balancing

    Don't worry about the phosphates. Pool stores have been really pushing phosphate removers this year, but they are almost never required. I don't see the point in paying for them unless you have one of the rare cases that require removing phosphates.

    With a SWG your CYA level is a little low but not a big deal. I would shock first and then raise CYA to between 70 and 90.
    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: Need help with SW IG pool water balancing

    Quote Originally Posted by JasonLion
    Don't worry about the phosphates. Pool stores have been really pushing phosphate removers this year, but they are almost never required. I don't see the point in paying for them unless you have one of the rare cases that require removing phosphates.

    With a SWG your CYA level is a little low but not a big deal. I would shock first and then raise CYA to between 70 and 90.

    I will give that a try then and let you know how I make out.
    19,000 gallons
    Cartridge filter
    IG vinyl, Propane heater
    SWG, 2006 Taylor Test Kit

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