The Best Water Profile for Hard Seltzer (Starting Water & Minerals)

Thick Brush Stroke
Thick Brush Stroke

The best water profile for homebrewing hard seltzer is similar to, but not exactly, a Dublin-style profile. Hard seltzer requires water high in alkalinity and yeast nutrients built up from a distilled or RO water base.  

If you don’t have access to Dublin-style water, reverse osmosis or distilled water is your best starting point. 

What is the ideal water profile for hard seltzers?

When homebrewing hard seltzer, the ideal water profile is similar to a Dublin style. Hard seltzers require high alkalinity to offset the pH drop that occurs during fermentation.  

How do you find your water profile?

There are three basic options for finding your water profile Do it yourself Contact your water provider Bring in a professional

How important is the water profile in brewing?

The water profile of hard seltzer is important because an improper profile can stall fermentation through low pH. After fermentation, it can also affect the end clarity and flavor. Adjacent to water profiles is fermentation-specific additives such as yeast nutrients. 

How do you adjust your brew water profile?

Water profiles can be adjusted with various salts and chemicals depending on the necessary adjustments. Use sodium bicarbonate to raise the pH by adding alkalinity, calcium sulfate to lower the pH, or calcium chloride to lower the pH and balance the chloride to sulfate ratio. 

What is the best water to start with for hard seltzers?

As this is often not the case, the best water to start with for hard seltzers is reverse osmosis or distilled water. Both types of waters will have no other minerals or chemicals that might affect your seltzer. 

What to add to RO or distilled water to make a hard seltzer

To create the best water for your hard seltzer: You can use a pre-made water profile kit and adjust as needed or follow a recipe. For an average 5-gallon batch of hard seltzer, add 1.5 gm of baking soda, 1.25 gm Epsom salt, and 1.25 gm magnesium chloride.

What makes a good hard seltzer?

A good hard seltzer needs to be light, refreshing, clear, and moderately carbonated. Lightness comes from a low alcohol taste. Great water will provide a refreshing nature as well as clarity. Carbonation can be achieved by either priming sugars or forced carbonation. 

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