The Interpet PF Internal filter range is the most advanced and comprehensive filter available. It has been designed to give highly effective low maintenance filtration for your aquarium. Filtration System Importance: Filters are crucial components of an aquarium, removing toxic compounds like Ammonia, which can be lethal to fish and plants if untreated. The Interpet Internal Power Filter is an easy-to-use, versatile filter with adjustable flow rate and directional output. Filtration Types: - Biological Filtration: The biochamber houses media for beneficial bacteria to break down Ammonia. - Chemical Filtration: Black foam, impregnated with carbon, removes odors, heavy metals, and chlorine. - Mechanical Filtration: Plain foam traps waste particles, including uneaten food, dead plant matter, and fish waste. Patented 'Aqua Valve': This feature allows waste particles to enter the filter without falling back into the aquarium when the filter body is removed for cleaning. Venturi System: The filter includes a powerful Venturi that adds air bubbles to the aquarium, supplementing oxygen and creating a visually pleasing effect. Specifications for PF Mini: - Max Flow Rate: 200 Litres Per Hour (44 Gallons) - Max Aquarium Size (Length): Up to Approx 35cm (14 Inches) - Max Aquarium Size (Litres/Gallons): 5-40 Litres (1-9 Gallons) - Power: 5 Watts - Assembled Dimensions (LxWxH): 14.3 x 6.7 x 4.7cm.