When the electricity came on, the circulation pump inside the tank came on, and i left that running. but i didn't want to overwhelm the fish. so i decided to leave the pump in the sump and the lights off. I really wanted to focus on the temp of the water, since it got down to 63. I pretty much made a plan and when i hit a certain point and everything was ok i went on to another item, so then i turned the lights on then the pump in the sump. I pretty much had to make a decision and stick with it. I've never been in this situation and i didn't have power at the house to come on to wamas and ask. I don't know if this was luck or not. But everything seems to be ok. My domino fish had white spots all over the body and now he just got a tiny bit of dots but that's it.