For aquariums up to 300L (80 gallons)
Hydor Eth External Thermal Heaters are an innovative way of heating of heating your aquarium accurately and reliably, without having to have a cumbersome heaterstat within your tank.

First and unique external heater for aquariums with exclusive PTC (Positive Thermal Coefficient) technology
Easy to connect to any canister filter
The self limiting PTC heating element guarantees maximum safety against any risk of overheating
High precision electronic temperature control with signal light
Build with solid self extinguishing material for extra safety.