YukiHalu USB Powered Submersible Aquarium Heater, 10W/5V/2A Adapter, Mini Fish Tank Heater 10W with Built-in Thermometer, External Temperature Controller, LED Display, Used for 0.5-1 Gallon Tank : Amazon.ca: Pet Supplies
Heating Archives - Fluval Aquatics UK
3 Best small aquarium heaters for tiny tanks 1 - 10 gallons
P10 Submersible Heater, 10W, up to 3 US Gal / 10 L - Fluval USA
Fluval P Series Submersible Heater
Fluval P10 Submersible Aquarium Heater for Up to 3 Gallons, 10 Watts : Amazon.ca: Pet Supplies