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Thread: Fiberglass spa

  1. Back To Top    #1

    Join Date
    Mar 2013
    Cape May Court House, NJ

    Fiberglass spa

    Size of Spa 485 gal, cartridge filter, above ground, fiberglass spa.
    Free chlorine: below 0.6
    Combined chlorine: below 0.6
    bromine: below 1.3
    PH: below 6.8
    Acid Demand: below 638
    otal alkalinity: 10 ppm
    Spa size: 485 gal
    Filter: Cartridge
    Above ground, fiberglass
    Free chlorine: below 0.6
    Combined Chlorine: below 0.6
    Bromine: below 103
    PH: below 6.8
    Acid Demand: below 6.8
    Total Alokalinity: 10 ppm

  2. Back To Top    #2
    linen's Avatar
    Join Date
    Jul 2010
    Twin Cities, MN

    Re: Fiberglass spa

    Welcome to tfp, illingworth

    Do you have a question for us? This is a good guide to start asking a question:

    Is this a bromine or chlorine sanitized tub?

    It is likely your ph is much lower than you tested and should be raised imediatly to prevent damage to equipment. I would start by raising you ph using borax and calculating how much you need using, then retest after 1/2 of circulation and recalculate the new dose and add it, repeating this process until your ph is measurable.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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