1

I brewed an Imperial Stout and was aiming 1.099, but got 1.090 OG (By adding 1 pound of DME) After 13 days, my FG was 1.022 which was exactly my target.

5 months later, I took a reading and got 1.012. I tasted it, it's hard to tell if there's an off flavour. Beer is an intense 10.5% ABV having bourbon and wood in it. It's really good, but I don't know if I'm looking too hard to detect something different, after several sip I got a weird feeling that lasted quite a long time.

Might it be contaminated? Dangerous to drink? How to know?

Thanks!

1

I would suppose that with a target FG of 1.022 from 1.099, you would already have a bit lower FG. If I calculate this, however, from 1.099 to 1.022 is an attenuation of 77%. Using this from an OG of 1.090 leads to a FG of 1.020.

There might be another factor playing in this. I noticed with stouts with much roast malts that the yeast does not perform as well, and consequently I had gushers in some of them, but they were still very nice of taste and drinkable.

I think that a real contamination would have brought your final gravity much lower than 1.012 in five months, and that real off-tastes and smell would stand out. Measure your gravity certainly a month further.

As for the weak feeling, can you describe it further? Dizziness? Something else?

| improve this answer | |
  • It was a mouth feeling. Maybe some esters I wouldn't expect from a stout. But again, maybe I'm crazy because I had the feeling something happened since FG continued droping after 13 days. – Boubou Apr 30 at 17:23

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.