Up until now, I've been using a heating mat under one side of the tank to keep it at around 85 degrees...and the other side has just naturally been in the seventies (allthough, sometimes higher...I live in Southern California). It's starting to get almost cold outside now though, and I just looked at my tank- 85 on the warm side...and 68 on the cool! Gah! So, should I buy a second heating mat to make sure the cooler side is always around 75...or will she just hang out on the warmer side on colder days and not to worry about it.

