I'd like to make a 10 gallon batch of kolsch doing BIAB. I'm going for a more bohemian pilsner type grain/hop bill. What I would really like to do is make a 5 gallon batch as-is and the other 5 gallon batch with some carafa II added to make a schwarzbier type beer.
Long story short, how can I go about splitting the batch and making one light and the other black while using only one pot?
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