I could use some guidance on a strange sight I found in one of my batches.
-It's a BIAB all-grain pale ale, just Maris Otter, crystal 40L and Cascade hops, brewed mainly to test out my system with something simple.
-Around the end of primary fermentation at day 14 or so, I noticed some small white flecks bobbing around on the top of the liquid. I googled around and searched the site but can't find anything specific about what it might be.
-In the week since, it doesn't appear that they've multiplied. I notice that they sometimes travel slowly up and down in the beer.
-The beer doesn't smell bad through the airlock.
-When I poured the beer into the fermenter, I just dumped in all the trub which may have included some grain hull flecks that got through the bag. I'm thinking one possibility is that those have decided to float around some instead of settling out.
-The airlock is still outgassing a bit, if that means anything. I haven't taken a gravity measurement in more than a week but when I did I was just about 1.015 which is a hair over my target F.G.
-It's a 2.5g batch in a 3 gal carboy.
Some pictures attached from a week ago although there's actually less floating around now. The rest of the beer is really clear. Any ideas? I'll be racking this into a 2.5g corny keg this weekend and carbonating with corn sugar unless it turns out to be really nasty stuff.