I decided to try rehydrating my two packets of US-05 for this past weekend's 1.090-OG Russian Imperial Stout brew.
Here's the process I followed:
- I pulled a cup of 102ish degree-F water and poured the packets into it after chilling, while I was whirlpooling and siphoning into the fermenter.
- I conditioned the slurry with wort twice to bring the temperature down and acclimate the yeast to the wort's gravity.
- I timed it, and pitched the slurry right at the half-hour mark. Simple, right?
The yeast was definitely proofed and going in the measuring cup.
I did not bother to aerate the wort particularly; not needed with rehydrated yeast, right?
I was half expecting to see activity around the four-to-eight-hour mark, but like usual, I didn't see any airlock activity until well into the next day. It's going like a piston now, but I was wondering why it took so long to get going? Was it the high SG? The fact my ground water is already warm enough that I couldn't get my wort any lower than 73 degrees when my house's ambient temp is 65?