I'm brewing a Belgian golden strong ale for the first time. According to the fermentation schedule, it should cold crash and lager at 32°F (0°C) for three weeks. Even though I've cold crashed before, my technique has been to momentarily replace the airlock with sanitized foil. Keeping the airlock while cooling will suck water into the tank. A similar approach is mentioned in Lager Diacetyl Rest and Lagering Without Air Escape.
- Is there a better way to do this using a glass carboy?
- Is there a risk of oxidation since oxygen will enter the tank?