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Calculating hop age & alpha acid decay

Started by molc, September 11, 2014, 09:33:44 AM

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molc

Heya,
So, I've found the tool for this in Beersmith; no issues there. However, what I'm trying to confirm is the start date. I have hope from the 2011 and 2012 harvest that I bought from HBW about 9 months ago. They have a best before that runs out between now and Jan 2015.

In BeerSmith, to calculate the alpha acid decay, what date do I use? The harvest/ the purchase date or possible the best before?
Fermenting: IPA, Lambic, Mead
Conditioning: Lambic, Cider, RIS, Ole Ale, Saison
On Tap: IPA, Helles, Best Bitter

molc

Great, thanks. Time to use up the last of my supplies for the year :)
Fermenting: IPA, Lambic, Mead
Conditioning: Lambic, Cider, RIS, Ole Ale, Saison
On Tap: IPA, Helles, Best Bitter