Incidentally, if you think you might be having an extended power outage (for me the clue is usually the loud snap of the transformer going out...happens every time there is lots of lightning) the best thing to do is float your media in a basin of water, so that it is all the way wet but not submerged, "breathing" at the surface if you will.
Putting it in a sandwich bag is not such a good idea, because of the limited supply of O2 in the sealed bag.
However the bucket, basin, or whatever works just great and I have had media stay alive for over 24 hours in such an arrangement. It's really easy to tell when your media has begun "dying" because it smells quite a bit like a dead snail. Freshly killed media is still better than brand spanking new, though! It usually recovers fairly quickly.
Putting it in a sandwich bag is not such a good idea, because of the limited supply of O2 in the sealed bag.
However the bucket, basin, or whatever works just great and I have had media stay alive for over 24 hours in such an arrangement. It's really easy to tell when your media has begun "dying" because it smells quite a bit like a dead snail. Freshly killed media is still better than brand spanking new, though! It usually recovers fairly quickly.