Amazon.com: HITOP 25W 50W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup (25W) : Pet Supplies
Amazon.com: YOFOTHS Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller (50W) : Pet Supplies
3 Best small aquarium heaters for tiny tanks 1 - 10 gallons
Aqueon Aquarium Starter Kit, 10 Gallon Glass Fish Tank, LED Lighting, Filter and Heater - Walmart.com
Amazon.com: Hitop 50W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 – 70 Gallon Fish Tank (100W) : Pet Supplies
10 Gallon Glass Aquarium Kit | Marineland®
Tetra HT Submersible Heater 100 Watts, For 10 to 30 Gallon Aquariums, UL Listed | Meijer
Amazon.com: Tetra HT Submersible Aquarium Heater With Electronic Thermostat, 50-Watt, 2-10 Gallon : Pet Supplies
Aquarium Heater 25-50W Anti-Explosion for Tropical Fish Tank 1-10 Gallon Constant Temperature 26 Degrees - AliExpress
Amazon.com: NICREW Preset Aquarium Heater, Submersible Fish Tank Heater with Electronic Thermostat, 100 Watt, for 10 to 25 Gallon Tank, UL Listed : Pet Supplies