With all these cool betta tanks out there, the question comes up, how do you heat a tank under 5 gallons and not have this huge metal rod in it. I love my bettas, so I have to make sure the tank is at the temperature my betta needs.
This is a betta tank heater that goes in the tank and can even go under the gravel so you can hide it easily and not see it. This is one of my favorite small tank heaters because its out of the way from the fish. Since bettas like to lay on things i make sure to bury the betta heater. This heater is for 5 gallon tanks and under. This heater usually warms the tank to 5 to 10 degrees warmer than the room temperature.
Buy This Betta Heater Here