Amazon.com : Hydor Theo Shatterproof Aquarium Heater, 400-Watt & Ideal For 80 To 105 Gallon Fish Tanks, 15.5 Inches Long : Aquarium Water Heater : Pet Supplies
Hands On With The Hydor Theo Aquarium heater - FishLab
Hydor 50W Submersible Aquarium Heater - Original Theo : Amazon.ca: Pet Supplies
Hydor 25W Submersible Aquarium Heater - Original Theo : Amazon.ca: Pet Supplies