I would tend to disagree. Even if the water buffer is 20 feet thick, it will freeze all the way through, at least where I live. I mean you can buffer sub-free

I would tend to disagree. Even if the water buffer is 20 feet thick, it will freeze all the way through, at least where I live. I mean you can buffer sub-freezing temperatures for a few days, a couple weeks, but not for 6 months.