Campden tablets prior to mash

Discussion in 'Calculator Support Forum' started by Thirsty Panda, Feb 25, 2019.

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  1. Thirsty Panda

    Thirsty Panda New Member

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    Hello... I add a campden tablet 24 hours before brewing to take care of the chlorine. How do I handle this with the calculator?
     
  2. Nosybear

    Nosybear Well-Known Member

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    Drop the amount down to about a quarter tablet and ignore it? I use a half tab and no wait time to dechlorinate 10 gallons of water (on average) for a 6-gallon batch. The reaction between metabisulfite and chlorine/chloramine is generally nearly instantaneous, results in a trivial addition of sodium, sulfate and chloride. In other words, the ion contribution is insignificant.
     
  3. Thirsty Panda

    Thirsty Panda New Member

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    So you are saying to set the Cl level to 0 because I'm already cleaning it up beforehand?
     
  4. Yooper

    Yooper Administrator
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    Campden removes chlorine, NOT chloride. They are different things.
     
  5. Nosybear

    Nosybear Well-Known Member

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    ^^^ What she said. Metabisulfite and chlorine/chloramine results in a tiny bit of chloride, some sulfate and in the case of chloramines, a bit of ammonia. Given the amounts of each are about the measurement error on my other salt additions, I generally ignore the contribution from the meta. And the reaction is nearly instantaneous - no need to let the water sit out.
     
  6. Thirsty Panda

    Thirsty Panda New Member

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    Thanks for the feedback. The water report I have measures both Cl and Cl- . I've been using the campden to take care of the Cl (.47 mg/L).

    Also, thanks for the note about the time. I use a Robobrew timed for the morning so when I get up the strike water is ready to go. I'll probably not be as anal and just get the water ready the night before.

    Thanks again!
     
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  7. Nosybear

    Nosybear Well-Known Member

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    As long as you know why you're doing what you're doing, it's all good. Too many don't know why.
     

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