in your fridge? Or do you have a seperate brumation fridge that doesn't cool as low as a normal fridge? I personaly use a wine cooler as it keeps more suitable temps for NA colubrids. I have never noticed much water being consumed but I still feel it neccesary. Eventually I want to try brumating with an ac unit pumped dirrectly into my enclosures and have a small Basking area still available and observe if they still use it. While at this time I don't keep whips i have brumated numerous other na snakes.
Nate