Are all aquarium heaters junk. I've lost 3 in as many months. They die after power comes on from an outage. I guess the surge kills them, nothing else is affected, guess my TV is tougher than an aquarium heater Long ago a heater lasted close to the life of the aquarium. Heating filaments must be made very thin now, they are made to replace frequently just like light bulbs. My outdoor mini pond baby bluegill dropped to 63 deg. f a few days ago. I had new a heater, so I installed it. Took two days to get water back up to 65 deg. f with the outside temps below freezing. But all are happy.