Originally Posted by Baron von BeeGee
If you're not going to rack to a secondary then definitely wait until the kraeusen drops and the bubbling stops. I would even go so far as to take SG readings several days apart to ensure that fermentation has stopped.
I don't know which yeast you used, but my experience with 3068 is that it can ferment quite vigorously for several weeks if it wants to.
I used WLP300
for maybe two days it was rockin.. pretty much constant bubbling..
now it is about 4-5 a min i think.. i'll have to count after work.
one of my worries with it is that the kreausen doesn't look similar to a normal beer head. (which is kindof what i was expecting althought probably wrong..) but i'ts pretty gnarly and nasty looking.. how normal is that?