Submersible Digital Aquarium Heater 100W, Betta Fish Tank Turtle Tank

Perfect water temperature for betta: 75-81. Betta Heater Features. Compact Small Heater220-240V/60HZ oval shape design little aquarium heater, fast heating for small fish tank. 50W tank heater is for 1-6.5gallon, 100W tank heater is for 6.5-13 gallon.

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