Fall Hibernation Temps?

[Jackins]

Hey folks! It's been a while.

Leo has settled in fairly well here, but I had a few questions as this is the first time I've had to deal with the temps changing due to weather.

The last two feeding sessions I had with Leo required me to brain his mice as he would eat; he ate without issue. He's got a clean bill of health otherwise, and the temperatures here are finally dropping.

My concern so far is whether or not i need to get a second piece of heat tape for him, or not. We had our first cold night and the ambient temp in his tub is 66 degrees. I'm sure it'll drop lower at night and I don't want to kill him for being unaware.