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Thread: CH too low in vinyl pool?

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    Isaac-1's Avatar
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    CH too low in vinyl pool?

    After a lot of water replacement lately I did a full set of water tests today and found that my CH is only 40, I know the general thought is CH is not important for vinyl pools, but the pool school suggested level for CH in vinyl pools is 50-300, so do I need to bump my CH up?

    thanks Ike
    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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    Mod Squad jblizzle's Avatar
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    Re: CH too low in vinyl pool?

    Only if you have nothing better to do
    Jason, TFP Moderator
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    Isaac-1's Avatar
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    Re: CH too low in vinyl pool?

    Do you know why Pool school lists 50 for the minimum CH for a vinyl pool?
    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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    linen's Avatar
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    Re: CH too low in vinyl pool?

    JasonLion kind of summarizes the current recommendation of 50 ppm CH minimum here, but also refers to pool that have low CH with no problems (Bama has referred to his 0 ppm CH many times).

    The only other reason that I recall needed some CH for vinyl is if there is foaming issues which is rare in pools but more of an issue for hot tubs.
    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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