I have everything crossed.... tank is wrapped in blankets and a quilt, 5 hours after the 'event' the temperature hasn't even shifted by half a degree. I will be at the doors of my LFS the moment it opens in the morning to get a heater back into the water asap, this time I will be buying two, as I am not about to risk putting myself through this worry again.
5 hours gone, doors of the shop open in another 11 hours. please please don't let my fishy friends snuff it overnight.