FEDOUR 25W Preset 26℃ Aquarium Heater, Small Submersible Fish Tank Heater Compact Thermostat For 8-25L Freshwater & Saltwater Tanks, Thermometer Strip, Easy to Use, Automatic Constant Temperature

25W Heater Preset to 26℃: Designed for 8-25L freshwater and saltwater tanks, this submersible aquarium heater is preset to 26℃—the ideal temperature for bettas, turtles and most tropical fish. No dials or settings—less to adjust and less to go wrong, making it easier for even beginners Gradual Heating Protects Your Fish: Unlike other heaters that run at full power from the start, this aquarium heater uses our own stepwise heating design to warm your tank gently. This prevents the water temperature from rising too fast, giving more time for the fish to acclimate without the stress of sudden temperature swings Automatic Temperature Control: With a built-in thermostat, this fish tank heater maintains the water temperature at a steady 26℃ and starts warming again once it drops below (Due to different water circulation, a ±1℃ error is normal. But the heater will keep the temperature stable.)—plug it in and forget it. The indicator light shows red while heating and green when it is at 26℃ Protective Guard: A protective guard fully encloses the heating tube, keeping the fish from touching the hot surface, while its vents let water flow through freely. The guard comes off by hand for easy cleaning—no tools needed. Regular cleaning keeps the heating tube free of scale and extends the lifespan of the fish tank heater Complete Kit: This fish heater Comes with three suction cups and a stick-on thermometer—nothing else to buy. And the power cord is 1.5m long, mount it easily, plug it in and enjoy your tank. We also offer a 24-month warranty and lifetime customer service. Our team always responds within 24 hours