Yeah, I don't think that will work for me. My tank is in the basement and it gets down to the upper 50's sometimes...the Eco won't like that!
I had the same fear. My high fin pleco started looking drab when I was wintering with longnose gar at the mid 50's. I didn't take any chances and the dang thing is a massive freakin' poop monster in one of my tanks now!
Wish I would have pushed it a little further last time.
At 57F-58F it seemed fine.