Ebo Jager 150 watt Heater Ebo-Jager 150 watt approved to UL 1018 aquarium heater (submersible).   • 13.25 inches long with a 6 inch heating element   • For aquariums up to 60 gallons.   • Built-in thermostat accurate to 1/2 degree F.   • Low water level safety switch.   • 2 mm thick glass versus standard 1 mm for extra shock resistance.