Submersible 800W/1000W Aquarium Fish Tank Heater With Large LED Digital Temperature Display for Betta and Turtle

Advanced Over-Temperature Protection System

Safety is our top priority. This heater features a multi-layer over-temperature protection system. When the water temperature reaches 95°F, the heater automatically shuts off, triggers an audible alarm, and displays “HH” on the controller. It will only resume operation once the temperature drops to 94°F. The included auxiliary temperature probe provides redundant monitoring, ensuring more accurate and reliable temperature control for your aquatic pets.

Anti-Dry Heating & Power-Off Memory Function

Built with a water level sensor, the heater automatically cuts power if it is exposed above the water surface (by 5cm or more), displaying the “E1” error code on the controller to prevent dry-fire damage. Additionally, the controller features a memory function: in case of a power outage, it saves your set parameters and resumes operation with the same settings once power is restored, eliminating the need for reconfiguration.

Precise LED Digital Temperature Control

The external controller features a large, clear LED display that shows both the real-time water temperature and your set target temperature simultaneously. You can easily adjust the temperature in 1°F/°C increments between 63-94°F (17-34°C), and toggle between Fahrenheit and Celsius units with a simple button press. The dedicated thermal sensor ensures accuracy within ±1°F, while indicator lights clearly show heating (red) or constant temperature (green) status, plus error codes for quick troubleshooting.

Dual Quartz Tube Heating Technology

Engineered with dual quartz heating tubes, this aquarium heater delivers fast, even heat distribution with excellent thermal conductivity. The explosion-proof quartz sand glass construction is highly corrosion-resistant, making it durable and safe for long-term submersion. The nickel-chromium heating wire ensures stable performance, while the heat-resistant ABS protective shell prevents accidental burns and provides an extra layer of safety for your tank inhabitants.

Complete Kit for Reliable Setup

Each package includes everything you need for safe installation: an external thermostat controller, auxiliary temperature probe, UL safety certified three-pin plug, durable power cord, and strong suction cups for secure mounting. Available in multiple wattages (300W to 1000W) to suit different tank sizes (20-250 gallons), you can easily choose the right model for your aquarium, ensuring efficient and reliable heating year-round.