« on: October 22, 2012, 01:28:45 PM »
I've never heard of K-97 before this thread.
K-97 is a dry Altbier strain, similar to WY1007. I haven't tried them back-to-back, but they seem a bit different. They definitely are both strong top-croppers and are pretty sticky. Some people call it a "Koelsch" strain, but some people are wrong. It doesn't have the white fruit (pear/apple) and vinous esters you'd expect from a proper Koelsch yeast. K-97 is much closer to 1007 than to 2565. K-97 ferments cleanly and matures quickly. It's powdery, too, so it needs finings or extra time to drop bright.