The new innovative Tetra EasyCrystal Filter Box 600 is suitable for aquaria containing between 50 and 150 litres. An additional compartment enables an aquarium heater to be integrated into the filter. It is recommended to use the Tetra HT heater (not included). With ist intensive mechanical, biological and chemical filtration, the filter ensures crystal clear, healthy water:Mechanical filtration: Double-layered Filter Floss Pads reliably remove even the tiniest particles. White side = coarse prefilter, green side = fine filterBiological filtration: BioGrid with extra large surface area for the settlement of beneficial bacteria Chemical filtration: Special activated carbon to eliminate water clouding and unpleasant odours.It is extremely easy to clean the Tetra EasyCrystal Filter: simply replace the filter cartridge every 4 weeks. No need to rinse the filter medium, no more wet hands ! Technical data: power consumption: 230 V/50 HZ, 7.5 W, pump output: 600 l/h, for aquaria with 50 up to