Well the power went out briefly on Monday, and somehow my heater was turned off. All other devices were fine, except the heater. Unfortunately for my coral and fishes, I didn't realize the aquarium was so cold until today. When I noticed the problem, it was at 69 degrees. In fact, I only thought to check the temperature after I put my hand in the tank to target feed my coral.
After checking the graph of the temperature, it looks like there is only a couple of days of data showing, indicating the power loss we briefly experienced on Monday. Going forward, I think I'll change the default status of the heater to "ON", and I'll make sure to check the temperature more often. While there is no loss yet, my Maxi-mini Anemone and my Torch Coral are looking unhappy. I'll keep an eye on this closely.