- Hydor Theo 25-Watt Aquarium Heater is a fully submersible; shatter-proof glass aquarium heater ideal for 2-to-7-gallon fish tanks; measures 7 inches long
- Maximum Safety Aquarium Heater; THEO fish tank heater is shock resistant thanks to the patented PTC heating element and the shatterproof glass tube
- Free positioning in aquarium with supplied suction cups; The Theo aquarium heater can be placed in the fish tank vertically, horizontally and fully submerged
- Self-Control Limiting Technology; If heater senses abnormal functioning patented PTC heating system guarantees completely safe operation in case of dry running
- Great Fish Tank Heater for All Fish Tanks; Universal aquarium heater for use in fresh water or marine water fish tanks
From the manufacturer
Hydor Submersible Glass Aquarium Heater
The aquarium heater has all the necessary features for safe and precise temperature maintenance of the water in your tank. The exclusive technology and the high quality of the components ensure a long lasting product. Submersible, no thermal shock, high impact resistance, graduated scale, vertical and horizontal positioning and precise maintenance of set temperature.
The Theo fish tank heater has all the essential features for the precise and safe maintenance of the water temperature in your aquarium. The exclusive technology and the high quality of components guarantee a long life. The aquarium heater is submersible, anti-thermal shock, highly resistant and features a graduated scale for precise temperature regulation. It can be positioned horizontally or vertically. The Theo aquarium heater also features self-control limiting technology. So, if the fish tank heater senses abnormal functioning the patented PTC heating system guarantees completely safe operation in case of dry running.