My lager is happily fermenting at 54 at the moment, 2 days in. The last lager I made I didn't do a diacetyl rest and it came out great, but for some reason I'm thinking I'll do one this time. At what precise point
should I do it? I'm reading at 80% or thereabouts, but when will that be? My OG was 1.052, so would that be at around 1.020? I don't usually take readings until I'm sure it is complete.
I'm crossing my fingers on the weather too. It was in the high 50s today, and tomorrow it is supposed to be even warmer. This is some winter we're having here in NYC. I rely on the cold weather for my temps. Last year was cold and I had to worry more about keeping it from freezing. If it goes above 60 my beer will go above 60 with it, or maybe a little less. I have it in a shallow cold water bath right now in the cooler evening, I'll put ice bottles in it in the morning.