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Thread: CH in a vinyl liner pool?

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    JesseWV's Avatar
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    CH in a vinyl liner pool?

    I found a 50lb bag of Calcium Chloride at the local hardware store on clearance for $5 so I bought it. I have a vinyl liner pool and my CH is around 50. Along with everything else this gives me a CSI of -1.17.

    Is there any real benefit to adding it to the pool as far as corrosion goes or should I just keep it for the sidewalks in the winter?
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Re: CH in a vinyl liner pool?

    No real reason to add calcium. You control the CSI in other ways. What are your test numbers?

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    JesseWV's Avatar
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    Re: CH in a vinyl liner pool?

    FC: 7, CC:0, CYA: 70
    pH: 7.6, TA: 80, BOR: 40
    SALT: 2650, CH: 50
    Temp: 72F
    16k gal, 28'x3.5', Vinyl A/G, 1hp Pentair Dynamo 2-speed Pump, Hayward S160T Sand Filter, Intermatic HB800RCL Digital Timer, Intex 8110 SWG, TF-100 Test Kit, SpeedStir Author: Jesse's Graphical Pool Testing Log

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    Re: CH in a vinyl liner pool?

    There's nothing for your water to erode at, and the metals (for example your heat exchanger) won't erode/corrode until your water is far more negative, for the purposes of a liner pool your water is considered to be balanced.

    That being said there's no harm in maintaining CH levels if you feel it will make you more comfortable.
    Stuart Murray
    Scotland UK
    UK NPPOC

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    Mod Squad Bama Rambler's Avatar
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    Re: CH in a vinyl liner pool?

    My CH has been zero for years and no noticable effect to any of the equipment at all.

    I never worry about the CSI because I know it's not right. As long as you keep the rest of the chems at the levels recommended here you won't have a problem.

    People put too much stock in the CSI number. It's not nearly as inportant as some people make it. As long as you keep the levels within the recommended ranges your pool will be fine.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: CH in a vinyl liner pool?

    Listen to bama!! CSI is almost never needed to even think about UNLESS you have some special issues which don't allow your chemistry to be within the guidelines we suggest.

    A little out of contrariness , I have never calculated it for my pool and don't intend to.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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