I picked up a Cool Brewing Jacket this weekend, and plan to use it tonight for a brew in progress. I intend to add one frozen 2L to keep the temp around 68, but my question is do I add that right away, or wait for fermentation to kick off? My concern is that I might lower the temp too far and miss my target fermentation temp if I add it right away before the yeast start doing their thing and raising the temperature of the wort.
thanks
thanks