Blow Off Tube

We were concerned that the kraeusen head was going to blow the airlock off the
carboy. So last night we put in a blow off tube into the carboy neck
and placed the other end in a pot of water. We weighed the tube down
in the pot by strapping it to a marble pestle. It's been bubbling every
second since last night, 20 hours so far.

Kraeusen Overflow

This is our Fat Tyre home brew five days into the first fermentation. Check out the biggest and thickest kraeusen that I have seen to date. Kraeusen is the ‘rocky’ or ‘cauliflower’ heads of foam that appear on the surface of the wort during the first days of fermentation. When they reach their peak, between the fourth and the seventh day, they are called high kraeusen. And boy do we have high kraeusen!