Hydor Slim Heater for Bettas, Bowls and Aquariums

Hydor Slim Heaters helps your fish live a healthy life by promoting the ideal water temperature. Specially designed with the innovative positive thermal coefficient element to heat the temperature of your aquarium or terrarium an average of 5 to 10-degree warmer than room temperature. Designed for aquariums between 5 and 10 gallons.

They can be safely used in glass, acrylic or plastic bowls and aquariums.

They can be positioned submerged in water and also under the aquarium gravel.