Hydor Theo 400 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