Preset submersible aquatic heater for use in turtle habitats with up to 15 or 30 gallons of water. Helps keep aquatic turtles healthy and happy. Helps prevent loss of appetite to cold water temps! Great for Red Eared Sliders, African Sidenecks, Musk, Mud, Painted, Map, Diamondback Terrapin, and a variety of other great aquatic pet turtles!