Protein skimmer built for nano tanks, the rated capacity is between 10 to 35 gallons (37 to 132 litres) aquarium. Product is height adjustable and has a magnetic mount. It requires 8" (Approximately 20cm) of water level to operate correctly and is powered by Sicce pump. It has a small footprint of just 4.5" by 3" (Approximately 11.5cm by 7.6cm).