You know, I realize that everyone is not flush with cash, and not trying to trash anyone for a simple mistake, but this happens in the club 2-4 times a year throughout the membership, usually due to heater pot or control failure. Why don't more users run controllers (i.e., Digital Aquatics, Neptune, etc.) in their tanks? This would never happen in a tank with a controller even if the heaters were maxed out. It's well worth the investment. Just sayin'.