FOUR STAGE FILTRATION - For a cleaner, healthier aquarium. This filter removes particulate waste, odours, and toxic chemicals from the aquarium. Beneficial bacteria will thrive on the foams within the filter and break down the waste (excess fish food, plant matter, fish waste) EASY TO INSTALL - Comes with an easy-to-use fixing bracket. The bracket and suckers can be left in place while the filter is removed from the aquarium for cleaning INCREASED WATER CIRCULATION - The powerful venturi aerates the water by increasing water circulation and thus the surface area. Flow rate and directional control of the venturi is adjusted by a simple rocker switch QUIET OPERATION – Noise can be reduced by turning down the flow or siting the filter lower in the water to submerge the venturi. If turning the flow rate right down, be sure to direct the flow to the surface of the water to ensure adequate aeration MAINTENANCE – Large fish create more waste, which may cause the filter to block more easily. We recommend using Interpet Quick Clear, which clumps the particles together and helps the filter to work more efficiently