The Hydor Theo Aquarium Heater is completely submersible. The glass was engineered to be shatter proof and resists breakage. The cord for this model is approximately 6 feet long.
Made with the exclusive P.T.C. (Positive Thermal Coefficient) technology this heater is ideal for saltwater or freshwater tanks! Versatile positioning is an option with horizontal or vertical setup is possible.
This has all the features such as no thermal shock for safe and precise temperature maintenance of water in your tank. The high quality of the components, guarantee you a long lasting product!