AquaMiracle® 10W Betta Heater Super Mini Aquarium Heater Submersible Fish Tank Heater USB Powered Pre-Set Temperature 78℉(26℃), for Tanks up to 1 Gallon Price: $9.99 (as of 10/11/2023 13:15 PST- Details) & FREE Shipping.

SUPER MINI SIZE – “The thumb size heater”. By far the SMALLEST 10 Watt aquarium heater. Super short – measures only 1.97 inches (5cm). The innovative super short length perfectly solves the headache of the fish keepers on the large size of the traditional heaters! Takes up tiny space, easy to hide, no more eyesore!
TEMPERATURE PRESET 78℉(26℃) – The best temperature for tropical fish is 78℉(26℃). This betta heater is preset to that temperature, which makes fish keeping much easier – fix the heater in the aquarium with the suction cup, plug in, and you are good to go! The intelligent in-built chip will keep your water temperature at 78℉(26℃) automatically. Kind Reminder – Use for water capacity less than 1 Gallon only.
USB POWERED – This fish heater is USB powered. The 5V/2A low voltage is very safe to both human and fish. Note that 1 – power adapter is not included; 2 – Output of the power adapter should be 5V/2A.

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