Came back on at 4 pm yesterday. House was 60 degrees, and tanks must have been about the same, despite the blankets on them. Instead of rapidly heating up the tanks with warm water, I just let the heaters do their thing, and amazingly (to me, at least), had no fish losses. Whew, am I exhausted. However, it still seems trivial to what Bill, et al, are going through up north.