What is the temperature in the room? More specifically the area that you are putting your tank in. Lights can also affect temperature of a tank.
This is incorrect.RCS like warmer water. I'm sure they won't die in the low 70s but I think 60s is probably pushing it.
Anything's possible, but it's very unlikely that this would work. Most of the animals capable of this sort of thing have evolved special mechanisms that prevent their cells from bursting when they freeze (as occurs in most animals when they get frostbitten.)I wonder if you could freeze one solid and slowly warm it up if it would survive.