Irish Moss is a clarifier and is used to clear protein during the boil when mash brewing. Add one teaspoon per 20L of wort, 10 min before the end of the boil.
Add 1 tsp to water prior to fermentation, to replicate the natural hard water supply when making English Ales etc. 1 tsp. of Epsom Salt (MgSO4) in 20 litres of water will increase concentration of (Mg++)ion 52ppm (SO4--)ion. 207ppm.
Used for making drier, lower carb beer styles. Add with the yeast to break down more of the malt sugars which allows the yeast to ferment them for a lower carb, drier beer. This enzyme may extend fermentation time so ensure the specific gravity is stable for 3 days prior to bottling.