technical data Hydor Hydrokable Ground Heater 25 W: + Heating Power: 25 W. + Cable length: 4.30 m. + for aquaria: 40 up to 65 litres. + 230 V/50 Hz, with Euro plug. + stable suction cups. The Hydor Ground Heater -Hydrokable- guarantees regular and even heating. It generates a slow water circulation through the material on the bottom of the tank, thus creating the natural effect of waterbearing stratum. The heating cable can be use in aquariums, als well as in terrariums.