Hydor Betta Bowl Slim Fish Tank Heater, 4-watt, Measures 3 Round, Black; for Tanks 1-2.5 gallons

Hydro Slim Heater helps guarantee your fish a healthy life by promoting the ideal water temperature. Specially designed with the innovative PTC Film (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. Whether its a glass, plastic or acrylic tank with fresh or salt water, this product is great for creating a more livable environment for your Betas, Glowfish and many other kinds of fish and reptiles.