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Thread: Low CH

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    Low CH

    I just opened the pool and tested....the calcium hardness has gone down to 280 from 450+ at the end of last season. We did have alot of snow/rain this winter and spring.
    My question is.... should I raise the CH or just let it rise on it's own?

    Thanks!
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    Mod Squad zea3's Avatar
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    Re: Low CH

    The recommended range for CH is 250 to 350 so you should be just fine.
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    susa's Avatar
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    Re: Low CH

    in the recommendations for SWCG, plaster CH is suggested at 300

    what would be the effect of having a value half the recommendation ?

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    JasonLion's Avatar
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    Re: Low CH

    Low CH levels can pose a risk to plaster, possibly contributing to pitting or lowered plaster lifetime, depending on your other levels. Low CH can also contribute to metal stains on fiberglass and may contribute to shortening fiberglass gel coat lifetime.
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    susa's Avatar
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    Re: Low CH

    Jason, thank you. Always thought the new plaster (now just 6 months old) would naturally leach into the water but I do have a 5 gallon bucket from leslie's to increase calcium in the water.

    Will bring it slowly up to 300.

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