Automatic preset paludarium heater features 25 watts for heating up to 7 gallons of water. Preset: Simply attach to the inside wall of your turtles enclosure and plug in. The Paludarium Heater will warm the water to 78 F (26 C). SAFETY: The heater will automatically shut off if removed from water. APPLICATIONS: For use in Paludarium habitats with up to 7 gallons of water*. (*For use in 7 gallons of water. Heater must be fully submerged.) Mount on side or back of aquatic turtle habitat using enclosed suction cups. Fully submerge heater in water before plugging heater inelectrical outlet. Safety shut-off activates if removed from water. Allow 1-3 hours for water to reach the target temperature. Place heater near the filter outlet to improve circulation of warm water.