The Brew Blog

Coffee water minerals explained: calcium and magnesium extract flavor; bicarbonate buffers acidity. SCA targets, why magnesium wins, and how to read your water.

Best water for coffee depends on your region. Filtered tap, bottled spring, or reverse osmosis: a practical decision guide for hard, soft, and average water.

Water filter for coffee compared: activated carbon pitchers vs inline filters vs reverse osmosis. Which fixes your water problem at the lowest cost and hassle.

Third Wave Water reviewed honestly: it works, it's pricey at scale. The DIY mineral recipe alternative delivers the same results for pennies per liter.

Water temperature for coffee: the SCA's 195–205°F range is a guideline, not a law. How roast level, grind, and method shift the optimal brewing temperature.

Soft water coffee tastes thin and sour because there's not enough mineral to extract flavor. Fixes: spring water blends, mineral packets, DIY recipes.