My Williams Liquid Yeast pack is swollen tight and I cannot brew today. How long will it last?
After a pack has swollen tight, the yeast remains in the peak active state for about 2 days. If you cannot brew in this time frame, refrigerate the pack, and it will last an additional 5 days. Keep in mind that if you refrigerate the pack, it will become less active, and harder for it to start a full 5 gallons of wort, which increases the danger of bacterial infection in the beer. The best thing to do in this case is to make a yeast starter to reactivate the yeast (see the yeast starter section directly below).
