300W submersible aquarium heater is suitable for 20-80 gallons. Safety: UL listed power cord, SCR switch chips, multiple protection design to ensure safety and reliability, power off by induction when out of water or automatic cut off of power When the temperature exceeds 36 degrees Celsius. External Temperature Control System Design: It is possible to control the temperature without removing the heating rod or touching the water. Dual CPU temperature control system is more reliable. Appearance: Customized outer quartz tube, internal use of white corundum as a heat transfer medium, reduce heat loss, smaller size and more beautiful, add unique anti-scalding shell design . Parameters: 50W -300W Optional aquarium heater for 55-95 gallon tanks, temperature can be adjusted within the range of 24-32 degrees. Please note that the aquarium heater only heats when the aquarium temperature is lower than your setting temperature, and only works when the pointer points to the number (not the blank
