New answers tagged small-batch
You might be better off just buying filtered water. You can usually get 5 gallons for about $1.25
AJ deLange calculated that 4.7mg/L (~18mg/gl) of potassium metabisulfite (4.0mg/L of sodium metabisulfite) is needed to reduce a "worst case" scenario of 3mg/L of chloramine. (PDF, via the Wayback Machine archive of AJ's site). I've been using this to add K-meta along with my brewing salts. That works out to 188mg for 10gl of brewing liquor. A Campden ...
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