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 guarantee a long lasting product.
PTC Heating Film Technology
The use of the PTC (Positive Temperature Coefficient) heating element has been studied in Hydor laboratories since the early Nineties. It is made up of a special carbon-based ink applied to a plastic film. In the special ink deposited on the PTC film, the carbon aggregates move away from one another when the design temperature threshold is exceeded. This phenomenon allows for a dramatic increase in electrical resistance and, consequently, a drop in power, thus guaranteeing the Self-Limiting Factor, i.e. the safe control of the heat given off by the heating element. This innovative technology - currently unrivalled on the market - significantly boosts safety, and can thus be applied to a wide variety of heating systems.
* For use with aquariums and reservoirs from 80-105 Gallons.
Hydor 400W Theo Aquarium Heater Questions & Answers