Aqueon Pre Set Heater 50 Watt – Animart Pet Stores, Inc.
Aqueon Preset Aquarium Heater Black, 50 Watts, Up to 20 Gallons - Walmart.com
Finnex 50-Watt Hang-On Digital Controller Aquarium Heater, Titanium Tube, 10 to 20-Gallon | Amazon price tracker / tracking, Amazon price history charts, Amazon price watches, Amazon price drop alerts | camelcamelcamel.com
3 Best small aquarium heaters for tiny tanks 1 - 10 gallons
Neo-Therm Pro Heater
Amazon.com : Hydor Theo Shatterproof Aquarium Heater, 50-Watt & Ideal For 5 To 14 Gallon Fish Tanks, 7-Inches Long : Pet Supplies
Amazon.com: Finnex Titanium Aquarium Heater, 50 Watt HMA Series, Heater Guard, 10 to 20-Gallon : Pet Supplies
Amazon.com: Aqueon Submersible Aquarium Heater, 50 Watts, Up to 20 Gallons : Pet Supplies
Aquarium Co-Op Aquarium Heater, 50W & 100W | Fish Tank Heaters
Amazon.com: Uniclife Aquarium Heater for 5-20 Gallon Fish Tanks 50 W Submersible Adjustable Heating Rod with Electronic Thermostat Thermometer Sticker Protective Cover for Freshwater and Marine Aquariums : Pet Supplies