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Thread: CYA and Spas

  1. Back To Top    #1

    Join Date
    Jul 2008
    Sinking Spring, PA

    CYA and Spas

    I have an Artic Spa (360 gallons). It has ozone and SWG. I only use the Artic Spa chemicals, basically Boost (cholrine), Refresh (nonchlorine shock), and Ph up and Ph down).

    When I test the water the CYA is at 80? I never added CYA nor used any products containing CYA. It must be coming from my pool as people (mostly kids) go from pool to spa to pool. My pool CYA is at 50.

    I understand CYA as it relates to pools, but how about hot tubs? How high can I let it go before I need to drain it?

    4th Year Pool owner in Sinking Spring PA
    46'x23' Free Form Concrete (34,000 gallons), Aqua Blue Pebble Sheen Finish, Pentair IntelliChlor SWG
    Pentair Intelliflo Variable Speed Pump, Pentair D.E. FNS Filter, Pentair MasterTemp heater.

  2. Back To Top    #2
    poolgirl22's Avatar
    Join Date
    Apr 2010
    Stephens City, VA

    Re: CYA and Spas

    Is the active ingredient in your chlorine dichlor???

    If so, there's your CYA.
    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump Liquidator TFT100 test kit

  3. Back To Top    #3

    Join Date
    Jan 2009
    Cupertino, CA

    Re: CYA and Spas

    I found a picture of an Arctic Pure Boost bottle, which shows the main ingredient as sodium dichloro-s-triazinetrione, aka "dichlor" which adds almost as much CYA as it adds chlorine. On the other hand, I found another webpage guide where Boost was identified as lithium hypochlorite, no CYA there. Check the ingredients on the bottle.

    I recommend Nitro's Approach to Water Maintenance which works extremely well.
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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