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AquaTop 100 Watt Model GH-100 Submersible Heater | ASAP Aquarium
VIVOSUN Submersible Aquarium Heater 200w Titanium Fish Tank Heaters With Intelligent Led Temperature Display And External Temperature Controller | Wayfair
Fish Tank Aquarium Heater Thermal 50W Submersible for 3-10 Gallon Tank | eBay