Earlier today read a very good article on secondary fermentation from Home Brew Supply. It backed up what I've suspected and experienced. I'll summarize here and share my experiences. What is Secondary Fermentation? Techincally, secondary fermentation is any period of additional fermentation or conditioning that takes place following the primary fermentation period. Generally speaking, secondary fermentation involves transferring a beer out of its primary fermentation vessel into a second sanitized vessel. The point of secondary fermentation is to get the beer off the original cake of yeast and the sediments that have fallen to the bottom of the fermenter. When yeast goes dormant at the end of fermentation and begins to die off, the yeast cells will disintegrate and give off chemicals that negatively impact the flavor of your finished beer. Is Secondary Fermentation Still a Valid Process? The secondary fermentation process came into existence in the early days