300W Aquarium Heater, Fish Tank Heater

• PRECISE TEMPERATURE CONTROL: This aquarium heater features a high-sensitivity temperature sensor for accurate temperature control within ±2°F (±1°C). Adjustable from 59°F to 93°F (15°C-34°C) to support the needs of tropical fish, turtles, and aquatic plants. Long press the SET button to switch between °F and °C
• MULTIPLE SAFETY PROTECTIONS: This fish tank heater provides multiple safety protections for added reliability. The heater automatically stops heating when overheating, low water level, or out-of-water conditions are detected. When the water temperature exceeds 96.8°F (36°C), the display shows HH and heating stops. When the temperature falls below 59°F (15°C), L0 appears and the heater resumes heating. E1 indicates a low-water or out-of-water condition
• LED DISPLAY & MEMORY FUNCTION: The external digital controller of this submersible heater displays the real-time water temperature for easy monitoring and adjustment. The memory function retains your previous temperature setting after a power interruption, so you can resume operation without resetting the temperature. The red indicator shows heating is in progress, while the green indicator shows the set temperature has been reached
• 300W RAPID HEATING FOR 31-53 GALLON TANKS: This 300W aquarium heater quickly warms aquarium water and helps maintain a stable temperature. Designed for 31-53 gallon aquariums, it is suitable for both freshwater and saltwater tanks, providing consistent heating for a variety of aquatic environments
• QUARTZ GLASS WITH PROTECTIVE GUARD: This water heater for fish tank features a durable quartz glass heating tube surrounded by a high-temperature-resistant protective guard. The guard helps reduce direct contact between fish, plants, and the heating element while providing an added layer of protection during underwater use. Suitable for long-term submersion when properly installed and used

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