Zoo Med BettaTherm Heaters are perfect for your betta fish whose life is best in warm water. This 7.5 watt heater helps keep your betta bowl 5 - 10 degrees warmer than room temperature and is 100% submersible. The Betta Therm Heaters are designed in a round shape and fits in most glass or acrylic fish bowls.

• 3" Diameter - 7.5 Watts for 1-3 Gallons
• Increases temperature 5-10 degrees from ambient temperature
• Submersible heater can be used in Glass or Acrylic tanks and bowls