jayfaustini
Member
Why does Fermentis recommend such low rehydration temperatures for their dry yeasts?
Everything I've ever read says 95-105 is optimal. But Fermentis' spec sheets recommend MUCH lower temps, generally 27C ± 3C (80F ± 6F) for ale yeasts and 23C ± 3C (73F ± 6F) for lager yeast.
I understand that every yeast has a different optimal rehydration temp, but 20 degrees lower seems strange.
Temperature shock of 20-30 degrees is probably worse for viability than non-optimal rehydration temperature.
Is this just a dubbed down recommendation to keep it simple and still prevent temp shock? Are they just recommending non optimal lower temps for people who don't step down the yeast temp to fermentation temps with small additions of cold wart?
Everything I've ever read says 95-105 is optimal. But Fermentis' spec sheets recommend MUCH lower temps, generally 27C ± 3C (80F ± 6F) for ale yeasts and 23C ± 3C (73F ± 6F) for lager yeast.
I understand that every yeast has a different optimal rehydration temp, but 20 degrees lower seems strange.
Temperature shock of 20-30 degrees is probably worse for viability than non-optimal rehydration temperature.
Is this just a dubbed down recommendation to keep it simple and still prevent temp shock? Are they just recommending non optimal lower temps for people who don't step down the yeast temp to fermentation temps with small additions of cold wart?