There is chance everything will be ok since it was such a short outage, but only time will tell, 62 degrees isn't devastating but slowly raising the temp back up is highly recommended. I have lost $1,000's worth of corals before in the aftermath of a hurricane, power was out for 2 weeks, I was able to save most of my fish only tank with a battery operated air pump & water changes, the reef tank was toast within 24 hours.....never again, I purchased a Honda eu2000 generator, now if a thunder storm knocks out power, I still have juice for the tanks.....& TV LOL. Good Luck, hope everything survives.