Aquarium Heater, Submersible Fish Tank Heater, 600W, LED Digital Display, 50-105 Gallons

• Premium & Durable Construction Built with stable nickel-chromium heating wires, high thermal conductivity sand particles, and explosion-proof quartz glass tube. These high-quality materials ensure the heater’s excellent performance, durability, and long service life—giving fish keepers peace of mind for daily use.
• Water-Off Power Cut & Memory Function Features a safety design that automatically cuts off power and flashes error code "E1" when the heater is removed from water, preventing overheating risks. Once the water level returns to normal, it retains the previous temperature setting, eliminating the need for repeated adjustments and saving your time.
• Advanced Inverter Technology for Energy Saving Adopts advanced inverter technology to adjust heating speed based on the tank’s water temperature. When the actual temperature is far from the set value, it works at full power for fast heating; when approaching the set temperature, it switches to low power for slow heating. This not only saves electricity but also maintains a constant water temperature efficiently, avoiding sudden temperature fluctuations that stress aquatic life and extending the heater’s lifespan.​
• Precise Temperature Control & Clear Display Equipped with a built-in chip that maintains water temperature within a 1°F (≈1°C) range—much more accurate than traditional knob-type heaters. The external thermostat’s digital display shows two readings current temperature and set temperature, making operation easy. It supports temperature adjustment between 59-94°F (15-34°C) (switchable between °F and °C), and the clear, easy-to-read design lets you monitor the tank’s temperature at a glance.​
• Wide Compatibility Suitable for freshwater and saltwater aquariums, turtle tanks, reef tanks, and aquascaping setups. It can also be used for pet fountains and plant seedling cultivation—meeting multiple needs of fish enthusiasts and hobbyists.​
• Important Notes： The aquarium heater should be completely immersed in water, the temperature controller can not be put into the water. <br>When cleaning or maintaining the aquarium heater, please turn off the power for 5-10 minutes before removing it for cleaning.