Ultra-Safe Intelligent Submersible Aquarium Heater 300W/500W/800W Electronic Precision Thermostat Fish Tank Heater with Run-Dry and Overheat Protection for 40~220 Gallon Fish Tank

300 watt fish tank heater is a fully-electronic high-quality heater for 40~80 gallons aquariums fish tank. This aquarium heater 40 to 80 gallon has an intelligent dual temperature and water sensor system, combines electronic accuracy, reliable monitoring, and multiple safety features to easily maintain desired aquarium water temperatures, the temperature accuracy within ±1?. The aquarium water heater is made of 28MM thickened explosion-proof quartz glass material and high-temperature resistant nickel-chromium heating wire with silicon carbide heat conduction, faster water heating, longer lasting and more stable. Equipped with a high-quality ABS material anti-scald shell that provides against accidental damage while protecting your fish, aquatic organisms and you from scalding. And the stylish & exquisite water heater for fish tank looks great in pretty much any tanks, and the compact design 300W heater for aquariums is great for the aquarist crowd that takes the aesthetics of their tank very seriously. The upgraded small aquarium heater features with LED backlight temperature digital display, which can clearly observe the water temp in real-time. It will be red when heating, and blue when the temperature is being set or the heater stops heating. Multiple Safety Protection Function Fish Tank Water Heater: ?Run-Dry Protection: when fish heater leaves water, the power will be automatically shut off, and it will restart when completely submerged in the water. ?Overheat Protection: once the temperature exceeds 94? or rapidly heats over the set temperature, the turtle tank heater will automatically stop heating. ?Low-Temperature Protection: once the water temperature is below 59?, the betta tank heater will heat quickly until the water temperature is higher than 59?.