The Hydor Theo Shatter-Proof Submersible Heater is a New aquarium heater functioning with the exclusive PTC (Positive Thermal Coefficient) technology. The Hydor Theo Aquarium Heater has all the necessary features for safe and precise temperature maintenance of water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product. The Hydor Theo Heater is good for saltwater or freshwater aquariums. The Theo Heater can be positioned vertical or horizontal. The Hydor Theo Heater provides no thermal shock, is submersible, and engineered shatterproof glass designed to resist breakage in most normal aquarium situations. Cord is approximately 6 feet long.
