[tommymorris]

This morning I woke up to a double layer of bubbles in the fermenter (krausen and another layer sever inches above).



The picture above was taken 17 hours after pitching yeast slurry.  I believe the layer up top is a fine layer bubbles created by a long mix stir session. When fermentation started CO2 must have pushed those white bubbles up and suspended them several inches above the krausen. 

[yso191]

That is cool.  I've never seen that.  But I can't see it now as I ferment in stainless steel.  I do miss watching things.

[4swan]

The top layer looks like starsan to me.  But, I've never had it survive the addition of wort.

[duboman]

I agree, looks like star San or left over froth from when you filled the vessel and it stuck there

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[beersk]

Yeah, that's gotta be Starsan. It didn't take me long to stop missing being able to watch the fermenting beer once I switched to kegs and buckets to ferment in. I'm pretty glad to be done with glass.

[HoosierBrew]

Yeah, totally looks like star san. And I'm glad to be done with glass, too.

[tommymorris]

That's a plastic fermenter, fellas. I'll be honest I got it just so I could watch the action.

Re: Starsan. I did sanitize with Starsan but I don't think there was any noticeable Starsan bubbles after mix stir. I mix stirred the heck out of it. The entire beer volume was one giant white foam. It could have been Starsan sitting on top of the mix stir foam but I just assumed it was all mix stir foam. Mix stir related foam can be very persistent. It always seems to last until the krausen consumes it.

[beersk]

Oh I know it's plastic, I'm not blind! Someone had mentioned being able to see fermentation, ie using a clear fermenter, and most are glass, so that's why I jumped to glass. I figure if I'm using plastic, it's going to be buckets as they're crazy easy to use all around. Except prying the lids off, which I had a lid removal tool for.

It is odd that the starsan foam would be up where it is, yeah, but I don't know how it could be anything else.