Zoo Med Aquatic Betta Therm Mini Aquarium Heater

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