And thank you to everyone who is helping me! I get pretty worried at times. I lost power this morning briefly which is bound to happen a couple times in the winters here, so I made a plan for what I'd do if it was for an extended period or if his tank dropped to a certain degree.
Right now, I'm even concerned while the power is still on so I want to try and rectify it before it gets any colder here. Prior to it becoming as cold as it has been (which isn't even that bad yet), the temperatures were more regulated properly.