Aquatop Titanium Heaters with DDC ControllerAQUATOP's fully submersible titanium heaters are super sturdy and offer a compact design for versatile placement. This series of aquarium heaters is virtually unbreakable due to its titanium heating element construct. All the titanium units have a remote sensor that can be placed away from the titanium heating element to ensure a correct and accurate temperature throughout your aquarium. The remote external thermostat has an easy to read temperature