We just lost power here last weekend from severe storms for two days.... I left it alone for the first day in the dark to see the temp had dropped about 5 degrees. I then took an hour drive to the lake house to grab the generator from there. After an hour drive back I shut off main breaker and put a male to male plug into the wall from the generator and back fed the line to the tank. (not the best idea to backfeed but my three kids were desperate as well) I ended up losing a german blue ram I had just introduced the day before. I then went and purchased a bubbler from bass pro shop. Just an inexpensive battery powered air pump. The blanket would have been a good idea to help temerature. I'm afraid in my case my Co2
may have overcome the oxygen in the tank from no circulation for around 12 hours, but I'm not sure. I will be prepared tho from now on. You really don't think about it till it happens and the power company estimates 3 days.