Fish tank heating rod Aquarium automatic temperature control 100W power,at 9.8 inches in length, with a 3-foot cord,more flexible to use. Meeting both seawater creatures and fresh water tanks' needs.Recommended seawater tank temperature: 77~80 °F;fresh water tank:77~82°F.Note:Specific temperature should be determinted by reality. [Precise Water Temperature Supervision]--Built in water temperature probe, once the water is below the proper and health living environment you set for your aquariums.The heater will be activited and heat the water automatically until the water temperature to the proper temperature you set. [Adjustable Temperature & Thermostat Device]--Visable temperature adjusting, the adjustable temperature range is 76 ~ 93 °F, once you set the temperature you want, it will automatically turn on or off .This fish tank heater has a built-in thermostat that will automatically keep the water at the set temperature to within ±2°F. [Safe Heating Tube]--2mm thickened quartz glass shell , 33% thicker than 1.5mm normal aquarium heater, providing a safe and efficient work, safer for both humans and your lovely fish. [Easy Installation]--Tool free installation, equipped with 2 strong suction cup, can well fixed the heater on the wall of your aquarium tank. It is designed for small aquariums fish tank and is recommended for aquariums from 15 to 32 gallons.