hector Senior Member Joined Aug 9, 2009 Messages 211 Reaction score 1 Jan 4, 2012 #1 Hi there ! What's the difference between "Fermaid K" and "Fermaid O" ? Hector
rhoffart Rick Joined Sep 12, 2009 Messages 815 Reaction score 6 Jan 4, 2012 #2 I can't answer that but I found this. http://www.lallemandwine.us/products/nutrient_strains.php