The Hydor 15 Watt Mini Aquarium Heater will raise the temperature of a 5 gallon aquarium 5 degrees F and a 10 gallon aquarium 4 degrees F. NOTE: The temperature setting can not be adjusted. This 6.5" X 2.5" X .25" heater can be completely submersed and can even be used when hidden under the gravel. It can be used in glass and acrylic tanks and will not cause damage or be damaged if left running dry.
