Calcium Carbonate, CaCO3, 50 g

In beer brewing, Calcium Carbonate (CaCO₃) plays a significant role in the chemistry of the brewing water. It is commonly known as chalk and is an important mineral for adjusting water profiles to achieve specific beer styles.

1. pH Adjustment:

• Calcium carbonate is often used to raise the pH of mash or brewing water, particularly in cases where the water or grist is too acidic.
• It's commonly added when brewing dark beers like stouts or porters, which have highly acidic malts. The carbonate helps buffer the acidity, balancing the mash pH for optimal enzymatic activity.

2. Water Hardness:

• It contributes to the temporary hardness of water. Hardness affects the flavor and mouthfeel of the beer.
• Higher levels of CaCO₃ are typically found in traditional water profiles for beer styles such as stouts from Dublin or porters from London.

3. Flavor Contribution:

• While it doesn't directly add flavor, the minerals from CaCO₃ can enhance certain characteristics in the final beer, particularly those associated with darker malt profiles.

4. Yeast Health:

• Calcium is essential for yeast health and flocculation (clumping together and settling out of the beer). It also aids in precipitating unwanted proteins, contributing to clarity and stability.

Usage Guidelines:

• Measurement: Begin by measuring the pH level of your brewing water and mash. Use a reliable pH meter or pH strips to ensure accurate readings and establish a baseline for adjustments.
• Dosage: Add small amounts of calcium carbonate (CaCO₃) incrementally and stir thoroughly after each addition. Re-measure the pH level after each adjustment until the desired range, typically between 5.2 and 5.6, is achieved.
• Dissolution: Ensure that the calcium carbonate is fully dissolved in the water to avoid clumping and to guarantee an even distribution throughout the mash. Proper mixing is crucial for consistent results.
• Monitoring: Continue monitoring the pH level throughout the mashing process. Make further adjustments as needed to maintain the optimal pH range and achieve the best brewing outcome.