AQUEON Preset Aquarium Mini Flat Heater - 5W

Aquatic 5 Watt Flat Heaters provide warmth for small tropical fish and are designed for glass or acrylic desktop aquariums up to 2.5 gallons. They are completely submersible, easy to install and efficiently warm aquarium water. Suctions cups are included so you can mount the heater to the bottom or side wall of the aquarium. Be sure to choose the appropriate size for your aquarium. Do not operate or leave product plugged in when it is outside of water. Designed to heat water to ~78 Fahrenheit. 

-Fully submersible
-Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank
-Quick and easy installation
-Shatterproof construction
-Can be used with glass or acrylic enclosures
-Note: Do NOT operate or leave product plugged in when it is outside of water
-5 watt works best for up to 2.5 gallon fish tanks