Vigorous ferment, zero krausen

[Halapeenyo]

I just brewed a sasion yesterday. First time brewing on my fermzilla. Within 3 hours of pitching fermentation was roaring. Pitched at 80f. Fermentation is still roaring, but there is zero krausen. I'm worried there will be no head retention on the final beer. Ever experienced this before? I usually have to use a blow off tube due to high krausen. Never seen such a vigorous ferment with no krausen before

 

[Beer666]

Yes i have had this happen and i do not believe it affects head retention. Had a few strains that don't look like they do anything but the end beer is still good. Never had issues with flat looking beer,

 

[jdauria]

Looks like there is a trub ring, so I am guessing that being at 80 degrees, it reached a krausen and then collapsed all in the span of those 3 hours? With such a vigorous fermentation, it could not sustain itself floating on top for long.