I have a 3 gallon carboy for small batches. The carboy fits right into a 6.5 gallon bucket that I have. I was thinking of putting the carboy in the bucket and filling it with to the neck of the carboy. I was hoping that in a couple of days or so that the beer in the carboy would be close to that of the water in the bucket? What do you think. Then I could just monitor the temp of the water in the bucket? I just want to monitor the temp closer. Will it work?