Submersible Aquarium Heater, Quartz Glass with External Controller for Betta Tank Koi Pond Saltwater & Freshwater

Information about AQQA Intelligent Aquarium Heater with External ControllerThis aquarium heater provides fast, reliable heating with a durable and safe design. Made of explosion-resistant quartz glass and high-temperature-resistant nickel-chromium, it works in both freshwater and saltwater tanks. The intelligent thermostatic control automatically maintains your set temperature, ensuring a stable and healthy environment for your fish.Easy & Precise ControlThe submersible heater comes with a convenient external controller for easy and precise temperature adjustments. Simply press the “SET” button to enter the setting mode, with each press increasing the temperature by 1°F/1°C. The range is from 59°F–93°F (15°C–34°C). You can easily switch between Fahrenheit and Celsius by pressing and holding the button for five seconds. Dual sensor probes provide more accurate temperature monitoring.Advanced Safety FeaturesThis heater includes multiple safety systems to protect your fish. The PC plastic protective cover prevents direct contact, while overheating and dry-run protection automatically shut off the unit to prevent damage. An “E0” error code appears if the heater is exposed to air, and a flashing alert will signal if the water temperature rises too quickly, ensuring a safe habitat.Usage InstructionsAlways fully submerge the heater in water before plugging it in and ensure proper water circulation in the tank. After turning it off, let the heater cool in the water for 15-30 minutes to prevent residual heat from causing damage. Following these tips will help extend the lifespan of your heater.  Detachable Protective Cover – Easy to CleanThe heater has a removable protective cover for easy cleaning. Just rinse it under water to remove algae or debris, keeping the heater working efficiently and lasting longer. For best results, clean regularly to prevent clogging and maintain stable temperature. Safe ProtectionSmart Constant HeatingDual Probe & Power Memory