Aquarium Systems New Jet Internal Filter Small is an interior “triple filtration” filter with a mechanical, biological and chemical filtration cartridge design. The water outlet is djustable to 360°. Can be used vertically or horizontally with a minimum water level of 3cm. Adjustable flow rate. Easy to use and comes complete with accessories. 5.5 Watts. Flow Rate 130-400 Litres per hour. Aquarium Size 20-50L.