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Thread: Pool Math question

  1. Back To Top    #1

    Join Date
    Nov 2014
    Palm Desert, CA

    Pool Math question

    My numbers for today are:

    PH - 7.8
    TA - 80
    FC - 4.5
    CC - 0.5
    CYA - 60
    CH - 450
    Salt - 3000
    temp - 92
    CSI - 0.4

    I've been using the Taylor booklet and CSI Watergram that came with my K-2006 kit to figure my chemicals but today used the pool math. Am I correct in thinking that the CSI number Pool Math is giving me under the "Now" column is what it has calculated from my chemical numbers? It is giving me a 0.24 while my Watergram is giving me 0.4. Which is correct?
    17,000 gallon inground pool; Plaster redone January 2015; Pentair Cartridge Filter; SWG; Age of pool unknown (house built in 1973); Taylor K-2006 Test Kit.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Pool Math question

    Probably both are right. Watergram gives the The Langelier Saturation Index. CSI and LSI are two different things.

    Langelier and Calcite Saturation Indices (LSI and CSI))
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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