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Thread: PH Vs CSI

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    Join Date
    Jul 2013
    Location
    Chandler, AZ
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    43

    PH Vs CSI

    Which is worse? PH of 7.0 or CSI of .36?

    If I increase PH to 7.5, my csi will be .36. If I leave PH 7.0, my CSI is -0.11 closer to zero than .36. But, leaving PH at 7.0 is ok? Which is better?

    Other numbers:
    FC - 7
    TA - 80
    CH-625
    CYA -60
    Temps - high 107 (AZ)

    Thanks!
    12x40 In ground, 16K Gallons, Pentair VS pump, 420 catridge filter, 140HC Heatpump, Stonescapes pebtec surface, Chandler, Arizona

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    mas985's Avatar
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    May 2007
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    Re: PH Vs CSI

    With a CH that high, you are probably better off slightly negative than positive and you really don't need to worry much about CSI between -.5 and .5.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
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  3. Back To Top    #3

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    Re: PH Vs CSI

    Thank you! Just to be clear there is no downside for having PH at 7.0?
    12x40 In ground, 16K Gallons, Pentair VS pump, 420 catridge filter, 140HC Heatpump, Stonescapes pebtec surface, Chandler, Arizona

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    JasonLion's Avatar
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    Re: PH Vs CSI

    Many people find that their eyes sting a little when swimming underwater with the PH below 7.2. We don't normally recommend going below 7.2 for that reason, but otherwise, 7.0 is alright.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  5. Back To Top    #5

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    Re: PH Vs CSI

    Thanks Jason!
    12x40 In ground, 16K Gallons, Pentair VS pump, 420 catridge filter, 140HC Heatpump, Stonescapes pebtec surface, Chandler, Arizona

  6. Back To Top    #6

    Re: PH Vs CSI

    I'm not seeing how your CSI is that high. What is your water temperature and what is your salt level?

    How are you chlorinating?
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