I live in Vermont, and have been dealing with the heating issue this winter...during one really cold week (like -5), I wrapped my BP's tank in extra shirts and sweaters of mine, and it did wonders - raised the temp by a good 8-10 degrees (to about 90 in combination with a 100W bulb). That said, it was a huge eyesore...but I'm sure if you get a heavy blanket or something it will do just as good and not look like your tank is trying to play dress-up.