Hi, I brewed an Imperial Wit on Monday. Extract, 1.5L starter with Wyeast 3463-Forbidden Fruit, OG 1.072. I aerated well. It fermented nicely with only a couple hours lag time but now there are only about 2 bubbles a minute in the airlock after only 72 hours. I pitched at 65 and it fermented at 70. I just checked the gravity at 1.022. Can I expect it to drop much more even with little activity in the airlock?
Too early to be thinking stuck fermentation?
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The Pol
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Sounds totally normal... leave it in there another week, then send it to the secondary for a couple... all is well my friend. You have already reached about 70% attenuation, it will drop several points even if you dont see bubbles, you are fine. That yeast only attenuates to 72-76%... so you are right on schedule.
Kauai_Kahuna
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Wit yeast go a little / a lot slower than your normal ale yeast. Adding a week to two to the primary fermentation is a good idea, mine just seem to slowly work the last two weeks producing very fine bubbles that are hard to see but it is still going.
Pivzavod
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You should be ok. I brewed my 2nd batch on Monday and I used a 3 foot blow off tube and kept my primary inside a closed igloo cooler. I did not see any bubbles up until today and kept it between 65-68F the whole time. I did have krausen and could smell a lot of guess but no air bubbling what so ever. I tried shaking it but still nothing. Today I took out the wort sample that was used to take OG that was kept in the same cooler and saw that it went from 1.40 to 1.22 in 4 days. I took out my primary out of the cooler and let it settle down for an hour or so and took another reading and it was 1.16. I am brewing AHS Blue Moon clone and FG is supposed to be around 1.10 so I guess I have a silent yet deadly 
fermentation. Since I took it out of the cooler the temperature has been steady at 68.9F and I've replaced the blow off tube with an airlock just to see if I ever get any bubbles.
The moral of the story is - dont jump to conclusions, take a hydrometer reading, keep it in the primary longer and you'll be ok. I am planning to keep mine in primary for 3 weeks even tho I am already near my target gravity.
My suggestion to you is to rehydrate your dry yeast if you use it. I did it for my first batch but not for second. First batch had a lot of activity but that doesnt mean anything.
fermentation. Since I took it out of the cooler the temperature has been steady at 68.9F and I've replaced the blow off tube with an airlock just to see if I ever get any bubbles. The moral of the story is - dont jump to conclusions, take a hydrometer reading, keep it in the primary longer and you'll be ok. I am planning to keep mine in primary for 3 weeks even tho I am already near my target gravity.
My suggestion to you is to rehydrate your dry yeast if you use it. I did it for my first batch but not for second. First batch had a lot of activity but that doesnt mean anything.
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The Pol
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Your yeast and process are fine, look at it... you got nearly 70% attenuation out of a 72-76% attenuating yeast in what, 3 days or so? That is really quick considering your OG... Id think it went quite fast instead of the other way around.
POL
POL
ifishsum
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As others have said, you're fine. With that high of an OG I wouldn't have even bothered to check it before 14 days or so - it will keep going but more slowly. It sounds like it's going exactly as it should be. Don't worry about what the airlock is doing, it won't bubble much after 4-5 days.
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