![Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies](https://m.media-amazon.com/images/I/812pkFj2f+L.jpg)
Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies
![Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies](https://m.media-amazon.com/images/I/61Wp1gIDR7L._AC_SS300_.jpg)
Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies
![Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies](https://m.media-amazon.com/images/I/71qFSDJ4NOL.jpg)
Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 5/8" hose - Original ETH 201 : Aquarium Heaters : Pet Supplies
Aquariums India - HYDOR External Aquarium Heater ~~~~~~~~~~~~~~~~~~~~~~ The first compact aquarium heater that operates externally, saving interior aquarium space. Installs vertically in the return line of a canister filter or sump,
![Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies](https://m.media-amazon.com/images/I/61lTqKjNxmL.jpg)
Amazon.com : Hydor ETH 200 In-Line External Aquarium Heater, 200w, 1/2" hose : Aquarium Heaters : Pet Supplies
![PetSolutions: Hydor ETH External Thermal Heater Inline Heater for Canister Filters and Return Pumps - YouTube PetSolutions: Hydor ETH External Thermal Heater Inline Heater for Canister Filters and Return Pumps - YouTube](https://i.ytimg.com/vi/OOqIiS5Ny4c/maxresdefault.jpg)