hygger 300W Aquarium Heater with Controller, Submersible Fish Tank Heater Intelligent Leaving Water Automatica Stop Heating and Overheat Protection, 20-80 Gal Turtle Heaters for Freshwater Saltwater

Hidden Heating Element: With 500W of reliable heating power, this compact heater for fish tank measures just 9.1" x 3.0" x 1.4", designed to fit discreetly in aquariums from 66 to 135 gallons; Operating on AC 110–120V/60Hz, it includes a generous 10.8-foot power cord (5.9 ft + 4.9 ft extension) for easy placement; Select the proper wattage using our sizing chart to ensure safe and effective performance; Perfect as a dependable tank water heater, it delivers steady warmth for your fish tank

Precise Temperature Control: Featuring a bright digital display, this water tank heater offers adjustable temperature settings from 59°F to 93°F with ±1°F/℃ accuracy, displaying both current and preset readings in ℃ or ℉;The fish heater automatically turns on when temperature drops 1°F below your set point and stops once reached, indicated by a clear red/blue light; Built-in memory retains settings after power loss, restoring your temperature automatically—no reset needed

Newly Upgraded Quality:Equipped with two explosion-proof quartz glass tubes and high-temperature nickel-chromium heating wires, this turtle heater delivers rapid, even, and highly efficient warmth;Its durable, heat-resistant ABS housing and reliable controller ensure safe, stable performance; The heater activates automatically when temperature drops just 1°F below your setting, maintaining a consistent ideal habitat for turtles, fish, and plants—a reliable guardian for your aquatic ecosystem

Dual Protection System: This aquarium heater features intelligent dual safeguards for reliable safety; If the heater for aquarium is exposed 2 inches above water, it instantly shuts off, displays "L1" with an alarm to prevent dry burning. Once resubmerged, it resumes automatically. If water temperature exceeds 95°F, it displays "HH" with an alert for quick response—effectively preventing overheating; Also functions reliably as a turtle heater in aquatic habitats

Safety Precautions: Please ensure the fish tank water heater rod is fully submerged in water and use the two suction cups to mount it vertically or horizontally on the aquarium wall; Always unplug the power cord and allow the aquarium heater to cool for 15 minutes before changing the water or cleaning the tank; Place it in an area with good water circulation to minimize temperature variations