The Fluval FX2 is a compact, powerful and very comfortable external filter with a very large filtering volume. The performance data of this filter are impressive: 9.5 litres filter volume, 3.9 litres of biological filter volume, pump output: 1800 l/h with only 27 W power consumption for aquariums up to 750 litres content. Nevertheless the filter is very compact and fits in olmost every aquarium cabinet. The Fluval FX2 has a ingenious self priming system. Only water and power on and the filter starts to pump. There is no need for priming or sucking.Fluval FX2 External Aquarium Filter+ Multi-stage filter pumps out 1800 l of water per hour+ Smart Pumpadvanced microchip technology continuously monitors and optimizes pump performance+ Self-starting - just add water, plug in and Smart Pumpwill take over. Trapped air auto-evacuated every 12 hours to ensure maximum efficiency+ removable, stackable media baskets eliminate water bypass and hold a total of 1 US Gal (3.9 L) of media+ all filte