Your (Phry's) observations about the dangers of cold water inappropriate for particular breeders and fry is something we all need to keep in mind.

That may explain the magic disappearing blue bellied limias (Poecilia melanogaster) in my fish room. I finally broke down and got them a good heater last year. More of them made it through the winter than usual. I probably should have cranked the heater up to close to 80 degrees F (27 C) for them. Duh! Again, when all else fails, read the instructions!

Limias are sorta guppy relatives from the big Carribean islands (the Greater Antilles). If one doesn't give them heat, evidentally one doesn't keep them.
:(

As for G.G.'s "hiding" two more tanks, maybe it's time for a very short article on hiding tanks and then a long survey from list members on where they hide tanks. ;)