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Thread: CSI

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    Can someone explain to me what CSI is and what effects it? What is the proper level for a SWG/pebble pool. Thanks
    27100 gallon in ground Pool/Spa, SWG, Pebble Sheen-Aqua Blue, (All Pentair Equipment) Pentair VS Pump, Cartridge- filter, build completed Dec. 2013, Houston, Texas

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: CSI

    It is an index for calcium saturation. Too high and you get scale. Too low and you damage plaster/grout. You want it near zero.

    If you follow the levels we recommend, the CSI will stay in range. It is generally not something you need to worry about.
    Jason, TFP Moderator
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