The Volcano Pool is heated--my kids swam at night in December and we could see the steam rising off the pool when it got cold out. They had a blast at the pool. We didn't go to the quiet pool so I can't give you an answer about that one.
We were just there end of Jan beg of Feb. Granted it was midnight but thae Volcano pool was COLD!!! It was 80+ degrees the whole time we were there too. Maybe they turn it off at night? I don't know.