FG woth Krausen? What the french toast?

I am brewing a Sam Adams clone, which requires a dry hop addition after fermentation slows/stops. I decided to take a gravity reading today and I noticed upon opening the lid I still have 1/2" thick krausen on top. I almost didn't take my gravity, but decided to anyhow. I took it 2 times and both times got 10. The final gravity for this brew should be around 13. So not only am I a little low (not a huge concern in my mind), but I have hit FG. It's hard for me to believe that I have actually hit FG considering there is still krausen, but maybe I am just crazy. Any thoughts? Thanks.



*with (drinking home brew)

sometimes the gunk on top can stick around a little while after fermentation is complete, also maybe you had an aggressive yeast that can eat more sugar than you think. Let it sit a few days and check again. predicted FG is not a magic wall that the beer hits, its more of an idea of what to look for. fermentation is dynamic and a few points here and there are normal as far as fermentation on a small scale goes.

runningweird said:

sometimes the gunk on top can stick around a little while after fermentation is complete, also maybe you had an aggressive yeast that can eat more sugar than you think. Let it sit a few days and check again. predicted FG is not a magic wall that the beer hits, its more of an idea of what to look for. fermentation is dynamic and a few points here and there are normal as far as fermentation on a small scale goes.

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Yeah, I just have yet to have a batch (save for this one) that had krausen when FG was achieved. Either way, I am gonna let this one sit for a little while longer. Plenty of home brew to drink while it does its thing. I just thought it was a little odd. I was more curious about the krausen, as FG is always an estimate.

probably still a lot of co2 still in the solution even after fermentation is done.

While taking a FG reading is the only way to tell if fermentation is complete, i would leave it in there until most of the Krausen drops.