boxtech Aquarium Heater, 50W/100W/300W Explosion Proof Submersible Thermostat with Adjust Knob and 2 Suction Cups Suit…

Fish Tank Heater: 300W aquarium heater suit for 55 – 80 Gallon fish tank. Voltage:110V, power cord is 5.57ft, Max deep water immersion 20 inch/1.7 FT
Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water flow.（This way the heater can quickly sense the water temperature and make adjustments automatically）, Keep the aquarium heater fully submerged in water
Fully Automatic Control: Design with External Temperature Controller, Temperature Range is 68 ºF-90 ºF, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating
Quartz Tube Safety Protection: Made of heat-resistant milky quartz Glass and UL-Approved Power Cord, Controller IPX4, Heater IPX8 that make it pretty shatter-proof and Explosion-proof and prevents electricity leakage, service life can be 3 years or more
Notice Please: Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater