I don't have any corals yet, just two fish, live rock and lots of inverts, but am looking to add some in the near future. . . but that is the subject for a future post
Thanks for the link to the battery operated air pump. Initially that seems like it will do the trick, but I think I need something that will kick in immediately if the power goes off, just in case I'm not home when it happens.
I guess a UPS is the most practical solution - I could hook it to a powerhead to maintain some waterflow as well as a heater to maintain temperature. If only they weren't so loud. I'm sure my husband and housemates don't want to hear it in the middle of the night.