hygger 50W Small Aquarium Heater, Betta Fish Tank Heater with Adjustable Temperature External Controller and Over-Temperature Protection, for 10-20 Gallons Freshwater & Saltwater Fish Tank Turtle Tank

🐟Mini Size but in Full Power: The 50W aquarium heater is designed for 10-20 gallons fish tank. Heater length: 4.7'', compact design, easy to conceal behind plants or other décor. The power cord is 6.5ft, long enough for indoor use. The hygger aquarium heater can quickly fill every corner of your fish tank with warmth! Please choose a suitable aquarium heater according to our parameters

🐟Adjustable and Accurate Temperature: When the water temperature is lower than set temperature, the heater starts to heat and the red light is on. When the temperature reaches the set temperature, the heater stops heating and the green light is on. Variable temperature settings range: 63-94℉/ 17-34℃. Accuracy: ±1°F. hygger fish tank heater can accurately display real-time water temperature, no need to buy an extra thermometer. Easy to operate, fishes happy

🐟Overheating Protection, Power-off Memory Function: If the water temperature exceeds 34°C/94°F, the heater will automatically stop heating, and the controller will flash the water temperature until the water temperature drops below 34°C/94°F. MEMORY FUNCTION – It can automatically retain the previous setting when the heater is restarted, no need to set it again

🐟Safe and Explosion-proof: The heating rod is made of nickel-chromium heating wire to faster heating rate; Thicker quartz glass, explosion-proof and crack-proof, safer and more durable; High strength ABS shell, that no fear of any external force damage, and won’t deform and melt under high temperature. It is much safer for human and your lovely fishes

🐟Customer Service: The fish tank heater is suitable for both seawater and freshwater, and can be used in fish tanks and turtle tanks. When in use, it needs to be submerged 100% in water. We promise to give you a 2-year warranty services from the date of purchase. In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement.

🐟Daily Maintenanc: If you need to change the water or clean the fish tank, please cut off the power first, cool the heater for more than 15 minutes, and then take it out after the heater is completely cooled. Please install a water pump or filter to help water circulating while heating.