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Small pile of Magnesium Sulfate used in brewing beers, used to adjust brewing water to match the style of beer being brewed.

Magnesium Sulfate

by SoCal Brewing Supply
$1.79 - $6.99
$1.79
$1.79 - $6.99
$1.79

Magnesium Sulfate (Epsom Salt) – Brewing Water Adjustment

Add Sulfate and Magnesium for Crisp, Hop-Forward Beer Profiles

Magnesium Sulfate, commonly known as Epsom Salt, is a useful brewing salt for adjusting water chemistry to improve beer flavor, balance, and fermentation performance. Available in both 2 oz and 1 lb sizes, this powdered water adjustment helps brewers increase sulfate and magnesium levels—especially helpful when building brewing water from RO or distilled water.

Unlike Gypsum (Calcium Sulfate), Magnesium Sulfate adds sulfate without adding calcium, making it a helpful option when you want to boost hop crispness while keeping calcium additions in check.

Key Brewing Uses:

  • Accentuates Hop Crispness and Bitterness: Sulfate helps sharpen perceived hop bitterness and dryness, making Magnesium Sulfate a great fit for hop-forward beer styles.
  • Adds Magnesium for Yeast Nutrition: Magnesium is a yeast nutrient and can support healthy fermentation when used in appropriate amounts.
  • Fine-Tunes Water Profiles: Useful for brewers building custom water profiles who need sulfate and magnesium without increasing calcium.
  • Pairs Well With Other Brewing Salts: Commonly used alongside Gypsum and Calcium Chloride to dial in sulfate-to-chloride balance and overall water chemistry.

Application Tips:

  • Recommended Usage: Use a brewing water calculator and your water report for best results. Additions are typically small, often around 0.1 - 0.5 grams per gallon depending on your starting water and target profile.
  • Use Sparingly: Magnesium levels are generally kept modest in brewing water. Overuse can create a harsh, mineral-like or sour-bitter character.
  • Best For: IPAs, Pale Ales, and other styles where a drier finish and sharper hop expression are desired.
  • When to Add: Add to strike water or mash water for even mineral distribution. Can also be used when preparing full brewing liquor in advance.
  • Works Great With: RO water and distilled water brewers building water profiles from scratch.

Product Specs:

  • Form: Powder
  • Sizes Available: 2 oz and 1 lb
  • Use: Brewing water mineral adjustment (adds magnesium and sulfate)
  • Purity: Food-grade Magnesium Sulfate

Whether you're refining hop expression in an IPA or building a custom water profile from RO water, Magnesium Sulfate (Epsom Salt) gives you more control over your brewing water chemistry. Small adjustments can make a big difference in flavor, dryness, and overall beer balance.