Available in different models: 50 of 4 W, maximum pump flow rate 170 l/h, max head 40 cm, recommended for aquariums from 20 to 50 litres 90 of 5 W, maximum pump flow rate 450 l/h, max head 50 cm, recommended for aquariums from 40 to 90 litres 150 of 10 W, maximum pump flow rate rate 650 l/h, max head 50 cm, recommended for aquariums from 80 to 150 litres 200 of 11 W, maximum pump flow rate 800 l/h, max head 60 cm, recommended for aquariums from 120 to 200 litres 300 of 12 W, maximum pump flow rate 900 l/h, max head 80 cm, recommended for aquariums over 200 litres Internal filter for aquariums 2-stage filtering system: 1st mechanical stage, 2nd stage of chemical or biological type Mechanical filtration by means of an open cell filter cartridge, captures waste and particles dispersed in the water Chemical or biological filtration: container that can be filled with activated carbon or other ceramic materials Equipped with special compartments for the insertion of filter materials, support bracket with suction cups Includes activated carbon and filter cartridge Incorporates a Venturi system for oxygenation of the water Direction of water flow adjustable This product is intended for indoor use only in water having a temperature not exceeding 35° C Anti-waste drop-out design Easy cleaning thanks to the possibility of unhooking the filter by levering the lower hook of the support