Well, I have to store my Shee outside. I've tested the coolant, it's supposed to be good to -25. It's been around -30 here a couple days this winter, and I'm kind of worried about my coolant. It's fine now, it's not frozen or anything, but then again it's only about -10 today. I'm just kind of worried that it might have frozen before, and then thawed again. If I did freeze, how can I go about finding out for sure? And if it did freeze before, what would it hurt?