Tue Jan 22, 2013 8:42 am
I've decocted a few times using rests in the 140 F range for 10 minutes than 150 F for 10 minutes. The attenuation on my last batch was not up to snuff so from now on I will rest at the same temps for 15 to 20 minutes each. In the past I used a protein rest but now am experimenting with skipping that step since it is not needed with today's well-modified malts. However, based on the last batch it looks like I might have had a better result had I done a protein rest. Maybe. More experiements are needed. But anyway, to answer your question, yeah, I'd go with at least 15 minutes for each rest, except maybe for protein rest then I'd only do probably 5 minutes at around 122 F then step up right away.
Dave
"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)