Visi-Therm Stealth Heater

Sleek, inconspicuous aquarium heater design incorporates accurate, shatterproof performance. Reinforced plastic casing protects the components against thermal and mechanical shock to eliminate shattering. Shuts off automatically when out of water; restarts automatically when in water. Fully submersible. Temperature select dial and aluminum cylinder distribute core heat evenly and efficiently with plus/minus 1.0 deg F accuracy. Easy to set and install. UL-Listed