Aquarium Heater, 300W-800W, for 250 Gallon Tank

Information about AQQA Fast & Precise Advanced Aquarium HeaterThis aquarium heater offers cutting-edge technology for superior performance, ensuring your aquatic environment remains perfectly stable and secure.Rapid and Energy-Efficient HeatingEngineered with innovative PTC new ceramic semiconductor material and a graphene coating, this heater warms your aquarium water quickly and safely. This advanced construction also makes it remarkably energy-efficient, saving you on power costs.Pinpoint Temperature ControlAchieve precise temperature management with the large LED display, which shows your set temperature with one decimal place. The temperature control is accurate to 0.5℉, allowing for meticulous adjustments. You can set the temperature safely and conveniently using the intuitive controller, with an adjustable range from 59℉ to 94℉.Smart Constant Temperature Inverter TechnologyThis heater utilizes constant temperature inverter technology to maintain a stable environment. If the actual water temperature is within 0.5°F of your set temperature, the heater operates at a lower power. Should the difference exceed 0.6°F, it switches to high power to quickly and accurately bring the water to the desired temperature, minimizing fluctuations.Dual Automatic Power-Off ProtectionSafety is paramount with two built-in automatic power-off functions. If more than two inches of the heater are above the water surface, it immediately stops heating, activates overheating protection, and displays an “Er” error message with a flashing indicator light, signaling a low water level. Additionally, if the water temperature exceeds 95℉, an “EE” error message appears with an illuminated indicator light, serving as an over-temperature alarm.Memory Function and Childproof OperationThe heater features a memory function, retaining your previous settings even after a power interruption. To adjust settings, simply press and hold the setting button for 3 seconds to unlock the controller. Use the up and down buttons to fine-tune your desired temperature. For added safety, the controller automatically switches to childproof mode if not operated for 3 seconds, protecting both children and your fish from accidental changes. AQQA PTC Intelligent Rapid Heating Aquarium Heater ( 300W/500W/800W ) Precise Temperature Control System 300W/500W/800W AQQA Upgrade Version Precise Temperature Control System Aquarium Heater Rapid and safe heating Precise temperature control system Constant temperature inverter technology Prevent dry burning & Overheat protection Memory Function Make sure there is enough water flow and water circulation in the fish tank when using the heater.Usage Tips Covered with graphene coating that heats the water quickly and safely.PTC New Ceramic Semiconductor Material With removable ABS plastic cover, easy to clean, ensuring the safety of fish.High-Temperature-Resistant Safety Cover Retain the previous set temperature when the heater is restarted.Memory Function & No Need Set Again If more than 2 inches of the heater is above the water surface, it stops heating.Prevent Dry Burning Function The error message "EE"is displayed if water temperature exceeds 95°F.Overheat Protection