Gerolsteiner is a sparkling water from Germany. Extremely high bicarbonate with strong calcium and magnesium; balanced and neutral-tasting despite high mineralization.
| Ion | mg/L |
|---|---|
| Calcium (Ca²⁺) | 348 |
| Magnesium (Mg²⁺) | 108 |
| Sodium (Na⁺) | 118 |
| Chloride (Cl⁻) | 40 |
| Sulfate (SO₄²⁻) | 38 |
| Bicarbonate (HCO₃⁻) | 1816 |
| At a glance | |
|---|---|
| Total of these six minerals | 2468 mg/L |
| Total hardness (as CaCO₃) | 1313.7 mg/L |
| Alkalinity (as CaCO₃) | 1489.2 mg/L |
| Sulfate-to-chloride ratio | 0.9:1 |
Mineral salts to dissolve in reverse-osmosis or distilled water, calculated by the BrewWaterSolver solver with the most common homebrew salts.
| Salt | 5 gal (18.9 L) | 20 L |
|---|---|---|
| Calcium chloride (CaCl₂) | 1.44 g | 1.52 g |
| Epsom salt (MgSO₄) | 1.94 g | 2.06 g |
| Chalk (CaCO₃) | 17.34 g | 18.32 g |
| Baking soda (NaHCO₃) | 8.25 g | 8.71 g |
Closest match with these salts; it can't reach Ca 390.5 mg/L vs 348, Mg 11.1 mg/L vs 108, HCO3 1436.4 mg/L vs 1816 exactly.
Gerolsteiner is sparkling - the salts give you its minerals; carbonate the water yourself (e.g. with a soda maker) for the fizz.
Chalk (CaCO₃) doesn't dissolve well directly in mash or sparge water without dissolved CO₂ - slurry it in carbonated water (e.g. sparkling water) before adding it, rather than mixing it into still water or sprinkling it in dry, or the calculated amount may not fully dissolve. How to dissolve chalk with CO₂
Volcanic Eifel region, Germany.