How cold can acrylic get?

[Jimr]

Hey guys,
Picked up another tank yesterday. Not going to bring it in till probably another month or two. Just getting thoughts on it sitting outside in the cold and cracking or splitting a seam. It's 3/4" acrylic. Thinking maybe putting light bulb in it to turn on at night. Still gets down to 18 deg. at night here.
Thanks, Jim

 

[Energy]

I kept one outside year round for over a year. Gets a little cold here in Minnesota. I did reseal it before filling it back up.

 

[Pharaoh]

So be fine outside as long as it is allowed to gradually adjust to any major temperature swings.