I'd go with the airpumps for sure. I had an outage in my tank a few months back, no more than 6-8 hours, and it led to my corals browning out and all fish except 2 kicking it. Not to mention the sweet cyano and brown algae that kicked into full gear. I would also manually circulate the water when possible to keep flow going at least temporarily. Low oxygen events are not good for anything in your tank.