SZELAM Aquarium Heaters 100W Submersible Fish Tank Heater, Anti-Dry Burning and Anti-Overheating, Explosion-Proof Fast Heating Fish Heater for Freshwater and Saltwater Aquarium Tank Heater

[Real Smart And Fast Heating]. A good partner for your beloved fishes! SZELAM aquarium heater adopts black quartz sand to conduct heat, which features a high-speed and all-round heat transfer effect that can quickly increase the water temperature. It stops heating when the water temperature is close to the set temperature and continues when the water temperature is lower than the set temperature. [Upgraded Protective Cover]. The fish tank heater 100w will be a livesaver to your aquatic pets. It will never scald your little fish, as the protective shell is designed with dense small holes, which can protect your fish from being scalded, as well as dissipating the heat to the whole tank. [Precise Dual Temperature Control]. Both suitable for freshwater and marine water,this aquarium heater 100watt is explosion-proof & anti-scalding. With built-in sensitive temperature control and intelligent heating function, the fish heater can provide accurate and stable temperature when working, while creating a worry-free habitat for your beloved fish. [Auto Shut Off]. More safety to you and your aquatic creatures, as the betta heater can automatically power off when out of water or overheat. When the heating element is out of water, the controller will display error code “E0” and stop working. And when the water temp excesses 93℉, the heater will stop heating with the controller shows error code “H”, and start working again when the water temp is lower than the set temp. [Free Your Hands with Easy Setting]. The submersible aquarium heater is adjusted by an external controller. There is a sticker on the back of the controller, you can stick it anywhere you want. It shows the setting temp and water temp at the same time, which is convenient for you to observe and adjust.