Two nights ago I woke to the smell of an electrical fire. No fire. Traced the smell to the aquarium. Turns out the submerged heater (which was properly submerged) burned out. The smell filled my house, stank up the water, and had my fish in distress (they were upside down struggling on the bottom.). Water was not hot. The heater was plugged into a cheap power strip/surge protector. It did not trip. My question- would a gfci have tripped since it was not water that caused the issue. Or would a better surge protector have tripped. I'm hesitant to get another heater. (Water still stinks but is improving after big water change and adding new filter media. Fish are at least swimming normal and eating).