Quote Originally Posted by jrossjr79 View Post
You know what your right, just this past winter we had 3 or 4 days that dropped below freezing.

Yeah, it's usually just overnight though sometimes it's during the day as well. Either way, it's something to be mindful of if you're doing the outdoor thing. I do think what you're trying to do is awesome! I've thought about doing an outdoor coral grow room but I never had the stones to actually do it. Very cool though!