There are battery operated air pumps that you should get as an emergency backup to keep the water aerated.
If you're careful, you can also use a power drill with some sort of attachment to agitate the water. Something like an egg beater. Just watch out that the fish don't come too close. I read online how a major aquarium experienced a blackout and kept their tanks alive in this way. Never had to resort to it myself though since I have battery backups (knock on wood).
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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