So ive been reading Froth!: the science of beer by Mark Denny. So far its a great book that has some good information about history and the science of brewing. Most of his brew techniques seem more "traditional" and might have something to do with his hate of the large brewing companies in the US.
But he says that many brew gurus recommend taking the scum ring off the fermenter after airlock activity has stopped to prevent off flavors. In addition, he says that you should rack to your secondary as soon as most fermentation is done, anywhere between 2-6 days!?!?!
i trust you guys more, but just wanted to see what you all thought of this contradiction i read a few days ago