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Thread: Scale

  1. Back To Top    #1

    Scale

    Hi,
    I have an inground plaster pool that is about a year old. There is a hot tub attached with a spillover that runs about 18 hours per day. The hot tub continues to form a white line of scale at the waters edge, yet the pool itself has no scale. Anyone know why? Is it the heat?

    PH: 7.8
    FC: 3
    CC:0
    TA: 70
    CyA: 60
    Southern California/sun all day
    26k gal/in-ground plaster/jacuzzi spillway
    dual speed 1.5/2.5 Hayward
    Cartridge Filter
    UV Ozonator
    Inline Chlorinator
    Wife in bikini and Margarita maker

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: Scale

    Yes, it is most likely the heat. Calcium is more likely to deposit at higher temperatures.

    Also, you should post a CH level. That will tell us a little more about what is happening.
    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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