Yep my

's went out too!
For about 5hrs, so once I arrived home the tank had dropped by 2 degrees, so I threw in an airstone with a battery backup and also placed a quilt over the entire tank to help insulate it a alittle.
Everything seems ok now, the temps back up and all fish and coral seem to be A-O-K.
This failure did teach me a lesson though, not only did I not have batteries for my flashlight but also for my backup airpump too-which meant I made a mad dash to the local corner store along with everyone else in my city block
