How does bottled water fare vs filtered?
filtered still has limescale, and it's about the minerals in the water which a filter can't add.
http://www.telegraph.co.uk/news/health/news/10875537/Secret-to-perfect-cup-of-coffee-lies-in-the-quality-of-the-water-researchers-say.html
@Sumo started
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How does bottled water fare vs filtered?