Superfish Aqua Flow Filter 100 (400 shown for illustration only)Dual Action Complete Filtration both Mechanical and Biological (with activated Carbon) Low Power Consumption only 3.5 watts Extremely Quiet with Full 1 Year WarrantyFor small tropical and cold water aquariums Very easy quick cleaning and filter replacement Has optional spray bar Adjustable outflow speedAdjustable outflow directionAlso good for fish breeding and quarantine bowls For aquariums size up to 50 to 100 litres (10 to 20 gallons)SUPERFISH have just introduced this NEW DESIGN internal filter. It supersedes the Aquaflow 1 and is a far better design with all the features listed above. The Easy Clean click system makes filter changing easy, you can replace the filter (recommended monthly) in almost no time. The dual action filter cartridge consists of fully open structure filter foam for perfect filtering and Activated Carbon to remove organic contamination, chemicals and dyes from the water.There is a switch to control the water flow and the outlet can be rotated to change the direction of the water flow to suit. There is also an optional spray bar included which is good to increase aeration in the water.