How magnesium and calcium ion filters create the best taste for coffee?

In the world of coffee, a delicious cup is not only determined by high-quality coffee beans but also by the water used for 

brewing, which plays a crucial role. ETERNAL WORLD's magnesium and calcium ion filter materials, applied in mineralized 

filter cartridges, bring a whole new enhancement to coffee extraction.

1. Adverse Effects of Hard Water on Coffee Taste

When we use tap water directly to brew coffee, we often encounter various problems. Tap water contains disinfection residues, 

residual chlorine, etc., which often result in white scale deposits after boiling, leading to a dry and hard water taste. 

Coffee brewed with such hard water tends to have a darker color, a rough texture, lacking the smoothness found in coffee 

shops, and may even have a sour taste. This is because impurities and inappropriate components in hard water affect the 

coffee extraction process and the final taste.

2. The acidity balance of magnesium ions and calcium ions

Improving Taste

To achieve a better coffee taste, we recommend using filtered water or water containing an appropriate amount of 

magnesium ions for brewing coffee. Magnesium ions can balance the acidity and bitterness in coffee, making the taste 

smoother. While magnesium ions do not directly regulate the acidity of coffee themselves, they interact with calcium ions 

to better dissolve acids in coffee, resulting in a more balanced and gentle acidity, avoiding overly sharp sourness. 

ETERNAL WORLD magnesium and calcium ion filter media used in mineralization cartridges effectively adjust the levels of 

magnesium and calcium ions in water, achieving the ideal proportion for brewing delicious coffee.

Meeting High-Quality Water Standards

The Specialty Coffee Association recommends using brewing water with a total hardness between 50 - 175 ppm to ensure 

flavor without the bitterness from over-extraction. Through the action of ETERNAL WORLD magnesium and calcium ion 

filter media in mineralization cartridges, water hardness can be precisely controlled to meet this standard, providing a 

high-quality water source foundation for coffee extraction.

3. Enhancement of Coffee Sweetness and Aroma by Magnesium Ion: Key Differences with Baristas

The coffee we brew at home often lacks flavor, while coffee brewed by baristas is rich in aroma. One important reason for 

this difference is that baristas strictly control the content of magnesium ions in the water used for brewing. 

ETERNAL WORLD's magnesium and calcium ion filter is applied in mineralized filter cartridges to ensure precise control of 

magnesium ion content in water.

Chemical Interactions and Extraction Advantages

Magnesium ions possess specific chemical properties that interact with other components. They enhance the efficiency of 

water contact with coffee grounds, accelerate the dissolution rate of flavor compounds in coffee, and fully extract them, 

thereby releasing more aromatic molecules and sweet substances from the coffee, thus enhancing its sweetness and aroma. 

Through the action of the filter materials in the mineralized filter cartridge, we can enjoy high-quality coffee at home similar 

to that brewed by professional baristas.

For both home and commercial use, ETERNAL WORLD magnesium and calcium ion filters provide a simple yet effective 

solution, ensuring every cup of coffee is filled with delicate aroma and rich flavor. For those seeking a high-quality coffee 

experience, choosing the right filters, such as ETERNAL WORLD magnesium and calcium ion filters, is undoubtedly a crucial 

step in enhancing coffee quality.