AquaTop Aquarium Heater - 200W
Th HT-200 200 Watt  fully submersible aquarium heater is perfect for tanks up to 50 gallons. The temperature is adjustable from 65 degrees F and 93 degrees F using the easy to adjust thermostat. Built with high impact safety glass and waterproof insulation. The design is compact and is only 11.4 inches long.