Viability of Already Opened 34/70 Sachet

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Pivoman

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I used about 1/3 packet of 34/70 dry lager yeast about 6 months ago, then crimped and kept the rest in a zip lock bag in the basement. Would the remaining yeast be good to use for keg conditioning? I naturally carbonate my kegged beer with fresh wort, the batch I’m set to keg and krauesen/keg condition is an Oktoberfest fermented with Omega Bayern Lager.
 

AlexKay

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It's probably fine, but if it's easy to pick up a new package, I'd personally do it. I've had slow-to-start fermentations that I can't definitively pin on opened, stored-in-the-freezer yeast, but I have suspicions. And what a pain if your keg doesn't carb up.
 

IslandLizard

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They should be fine as long as the yeast grains didn't get damp (or wet). If they're clumped together or smell moldy, make sure you have a backup on hand.

The yeast pouch would have been better stored in the fridge or freezer, inside a well sealed freezer or mylar/barrier bag, with all air squeezed out.
 

hottpeper13

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Can't speak to 34/70 but I use CBC for bottle conditioned barrel beers and add 3 grams to the bucket,fold the opening and put on a paper clip and into the dry yeast zip bag in the kegerator. Good to the last gram.
 

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