New answers tagged extract-brewing
Concur with Molot. I'd add that boiling water off can concentrate bad compounds like heavy metals, so if you really are that worried about your water maybe get it tested for safety.
As always, it depends. Boiling uncovered makes mineral content higher, but lets volatile components to evaporate. Boiling covered - opposite. We don't know what's in your water, so we can't reliably tell which is better. Ideally, mineral content is low, and your water supply uses ozone instead of chlorine-based substances to prevent bacteria growth - then, ...
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