fishkeeper Aquarium Heater, 300W/500W/800W Submersible Fish Tank Heater Double Quartz Explosion-Proof with LED Screen & Multi-Protection, for 60-160 Gallon Freshwater & Saltwater Tank - FK031

• 【Intelligent Precision Temperature Control】: When the water temperature drops below the set temperature by 1°F/1℃, the indicator light turns red, and heating commences. Once the water reaches the desired temperature, the light changes to green. Our 300W aquarium heater designed for tanks with capacities ranging from 60 to 105 gallons, this heating rod offers a temperature range of 59°F to 93°F. 【Multiple Protection Functions】: Overheat protection, once the water temperature reaches 93°F, the fish tank heater will stop heating, screen shows "HH". Low-temperature alert, if the water temperature goes below 59°F, the tank heater will continue heating, screen shows "LL". Power-off when out of water, our aquarium heater will automatically stops when its probe is exposed, screen shows "E1". 【Quick Safe Durable Heater】: fishkeeper aquarium heater adopts a premium high-temperature resistant ABS casing. The internal design features explosion-proof dual quartz tubes, filled with high-density silicon carbide sand and fast heat conducting nickel-chromium wires, ensuring uniform aquarium heating and effectively preventing leaks, this enables faster, safer heating, with a lifespan of up to 10 years. 【LED Digital Temperature Display】: The LED screen displays the current water temperature in ℉ (or ℃). Press and hold the controller for 5-8 seconds to switch between °C and °F. The clear LED display is easy to read, and you can effortlessly preset the desired temperature using the controller. Furthermore, the fish heater also features a memory function, so you no longer need to worry about power outages. 【Requires Full Submersion In Water】: Please ensure that the aquarium heater 75 gallon is 100% fully submerged in water before plugging it in. Equipped with four powerful suction cups, you can easily install the aquarium heater on the tank wall or bottom, whether it's vertically or horizontally. (Please Note: If any suction cups are missing or damaged, please contact us promptly for replacement.)