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Thread: conflicting info on CH

  1. Back To Top    #1

    Join Date
    Nov 2012
    Location
    Ontario, Canada
    Posts
    69

    conflicting info on CH

    My regular pool shop told me not to worry about ch level. every time my water test says my hardness is low they tell me to ignore it. they said that as long as my saturation index is in the acceptable range I'm fine (currently -0.8). Another shop however told me that the ch is important to prevent corrosion of the pool heater (they don't calculate csi).
    Which is correct?
    CH = 10 ppm but they said it should be 60-200.

    I have an ig sw pool with vinyl liner and gas heater.

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: conflicting info on CH

    The pool heater doesn't care in the slightest how low CH is. If CH is too high there could be a problem. However, some heater warranties require CH, even though it doesn't help at all.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  3. Back To Top    #3
    Isaac-1's Avatar
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    May 2010
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    SW Louisiana
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    6,711

    Re: conflicting info on CH

    Generally we feel that low CH is not important on a vinyl liner pool, although it may effect warranty issues for both your liner and your heater.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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  4. Back To Top    #4

    Join Date
    Nov 2012
    Location
    Ontario, Canada
    Posts
    69

    Re: conflicting info on CH

    Both are 15 years old so warranty is not an issue. Thanks!

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