Hydor ETH Heater 300W 16mm (5/8") In-Line Aquarium Canister Heating Fish Tank 8011195042616 | eBay
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,