Stealth Fermentation

I brewed a batch of oatmeal stout on Saturday with a OG of 1.053. I cooled to 68 deg. and pitched Safale S-04 at 8pm, and attached a blow off tube in case fermentation went crazy.

So I got up in the morning and peaked through the hole in the bucket. I didn't see any krausen; the surface was clear like it was just out of the brewpot. I didn't see any activity for a couple days, so I decided to pull the lid off to give it a stir. That is when I say a layer of yeast on the bottom of the bucket. Checked the gravity and it read 1.015.

It seems like this batch fermented out completely within 12 hours. I didn't see any sign of fermentation on the lid or blow off tube. Kinda weird... anyone seen something like this before?

S-04 can definitely accomplish a fermentation like this. Theres a discussion in the General Beer forum about it, as well...

https://www.homebrewtalk.com/f14/holy-crapper-but-s-04-works-fast-124211/

atleast you know not to worry about your fermentation anymore just because there are no bubbles!!

wow. if it tastes good too then you my friend are in business. big time.