I am wondering how much is the right amount to use. http://www.byo.com/component/resource/article/906-i-recently-moved-to-a-city-that-uses-chloramine-in-the-water-supply-it-was-suggested-that-adding-sodium-metabisulfite-to-the-water-would-clear-the-beer-of-this-compound-is-this-true states that one 1/2 ounce campden tablet will chlorinate 20 gallons. My tablets are Sodium Meta and they are .7 grams each which would mean I would need approximately 5 for a similar ratio. I have also read that the sodium meta is 1/2 as strong so she would likely need 10 tablets.
1/2 ounce campden tablet?? that can't be right, can it? That would be one huge tablet, yes? I've just been using one quarter of the normal size campdem tablets like you get from Northern Brewer.