Hydor THEO Heater 50 Watt

Hydor Theo 50 Watt Aquarium Heater is a fully submersible, shatter-proof glass aquarium heater.
Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube
Free positioning in aquarium with supplied suction cups
Self-limiting: the patented PTC heating system guarantees operation in complete safety because in case of dry running there is no danger for damage
Temperature range: 70-94 degrees Fahrenheit