New aquarium heater functioning with the exclusive PTC (Positive Thermal Coefficient) technology.
The Hydor Theo heater line features PTC patented thermal technology which makes it among the safest aquarium heater lines on the market. UL Listed by design, not by the use of accessories. Made from specially engineered shatterproof glass which, while not unbreakable, is designed to resist breakage in most normal aquarium situations. Highly accurate due to the use of precise micro-switch technology. For use in freshwater and marine aquariums. Two year manufacturer`s warranty. The 50W & 100W/150W models, at 7" & 8.9" respectively, are among the smallest sized heaters on the market. The Theo "minimum water line" requirement must be followed for proper operation.
Features:
The first shatter-proof heater thanks to the peculiar glass tube.
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.
Complete range: 2 new sizes 150W and the unique 400W.
Theo 50W for aquariums 5–14 gallons
Theo 75W for aquariums 8-22 gallons
Theo 100W For Aquariums 14–26 gallons
Theo 150W For Aquariums 23–40 gallons
Theo 200W For Aquariums 26–53 gallons
Theo 300W For Aquariums 53–80 gallons
Theo 400W For Aquariums 80–105 gallons