So last night, my power began to flicker. I knew there was a high possibility for the power to go out, but since last night i am getting worried for my fish. So my main question for here is, if or when the power does go out, is there any way that i can keep the temperature of the water warm enough for the fish to survive it. As it is cold in my house, and outside it is like 20* out with tons of snow, so the water would get uber cold very quickly.