PS: Where in S.Fla, & do you heat your loach tanks? If not, how do they fare on those particuarly cool nights like a couple' weeks ago?
I'm in Broward County, and yes I heat the clown loach tank to 82. The other tanks are unheated, but I had to place a heater in the community tank as it was dropping too much overnight. I left my RCS unheated and I didn't notice any deaths or issues.
The tanks are inside where I usually keep the house between 76-78 while we are present and 80-82 when we are out.
In the winter we never run heat, but we also don't get too many cold nights. This Sunday may drop into the lower 50's upper 40's.
My father keeps his 75g community tank outside. On really cold nights he'll cover it with a blanket and throw in an extra heater. In the summer he runs it without a top and with a fan constantly blowing across the top.