11/17/2023 0 Comments Nottingham yeast 2 weeksSo, in summary having your beer in the primary for 4 weeks is OK. If your primary fermenter is a glass carboy (or a Better Bottle) than there is no concern with respect to oxidation (glass and Better Bottle material are impermeable to oxygen). There is no ‘cut and dry’ rule for this timeframe but I have seen where some folks mention 4 week as well (maybe to be consistent with the yeast autolysis timeframe?). Over time oxygen will pass through the plastic walls and start oxidizing the beer. The timeframe of 4 weeks is not ‘cut and dry’ but it would be wise to not let the beer ‘sit’ on the dormant yeast for months.Ī plastic bucket primary fermenter is not impermeable to oxygen. The conventional rule of thumb was (is?) to not let your beer ‘sit’ on the dormant yeast for more than 4 weeks. The risk of yeast autolysis (the ‘breakdown’ of the dormant yeast) is debated amongst homebrewers. To get back to the specific question of “How Long is Too Long in Primary Fermenter?” The principle concerns for extended time in a primary fermenter are yeast autolysis and the potential for oxidation if you are using a plastic fermenter. Some folks like to leave their beers in the primary for ‘extra’ time to obtain the benefits of ‘maturing’ during this additional bulk conditioning time. Is that to oversimplify it?” Well, in all probability the fermentation of that beer was completed in 2 weeks. Click to expand.“Interesting that kits would say 2 weeks then.
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