The marina betta heater is an automatic, submersible heater that creates ideal water conditions for bettas to thrive in. the exterior is made of durable polymer, which is more resilient than traditional glass sleeve heaters. the heater is designed to reach and maintain a set temperature—no manual ad...

Betta slim heater helps guarantee your fish a healthy life by promoting the ideal water temperature. Specially designed with the innovative positive thermal coefficient element to heat the temperature of your bowl, aquarium or terrarium an average of 5 to 10-degree warmer than room temperature.