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I dry hop all my beers after a few weeks of primary fermentation (sometimes even in the primary fermenter without using a secondary) and every time I will get airlock activity for a few days after. For me its normally the first day after will go crazy but can last awhile. The beer always tastes great so I wouldn't worry.


It's not necessarily fermentation causing the bubbles. Temp changes or other things can cause dissolved CO2 to come out if solution. That's almost certainly what you're seeing.

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