I've racked my beer to a secondary fermentor and added about two liters of watermelon juice. I placed the airlock on as I always do during secondary fermentation but the fruit sugar is causing a vigorous fermentation. The airlock was filled with gunk within an hour.

Should I leave the airlock off until the fermentation slows down a bit?

1 Answer 1


That's a very quick response - was there still a lot of yeast in suspension?

Keep that fermention covered any way you can - fruit flies are going to lose their minds over this stuff. I suggest a blowoff tube going into some sanitizer.

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