I have also posted this in the B3 forum.
I kegged a recent 10 gallon batch of a my IPA into 2 5 gallon cornies. I did not filter the beer and force carbonated both kegs with the same volume of CO2. The first keg was put in my keggerator and and drunk over a 6 week period. The second kegs was in cold storage in my second fridge.
When I changed over to my second keg of IPA, after pouring off 3-4 pints of the settled yeast, I noticed the color had dramatically darkened. As a comparison, my first keg was about a 7 SRM (based on ProMash) and the second keg is closer to a brown ale, a little darker than a New Castle Brown.
I cant detect any noticiable differnce in taste or aroma. I am thinking that yeast had settled in the second keg and has begun to autolyze. I cant detect an off flavor but I cant figure out what else may be causing the second batch to change color so quickly and dramatically.
Has this happened to anyone else? Any ideas on what is causing the color change?
Chris
