ArticleHomebrew Science Experiments A lone figure stands above the steaming kettle. A sample of the malty liquid is carefully drawn off, cooled, and then poured into a graduated cylinder. He drops a glass hydrometer slowlyAlready a member? Log InWritten by Alex FodorYou'll Also Like Article MEMBERS ONLY Enzymes Ex Machina: Explore the world of exogenous enzymes For a long time the only enzyme most brewers would ever think about adding was some amylase enzymes . . . boy have times changed. Learn about the rapidly expanding world of exogenous enzymes. Article MEMBERS ONLY Insulation for Single Vessel Brewing What’s the best way to hold a consistent mash temperature for brew-in-a-bag brewing? We put the popular Reflectix insulation to the test.