Hi everyone! I haven't been on here in a while. I have a heating pad that I use for Lucifina ( I have since changed her name from Lucifer) and it seems not to get that hot and I was wondering has anyone ever heard of or used 21-ct. heat factory outdoor warmers? They are like little packets that you use to keep your hands warm. They are the size of your hand and I was wondering if it would be safe to put in her tank to keep her warm. I would like your opinion on this. Thanks!