Super effective easy to use and whisper-quiet filter. Keep your aquarium clean healthy and algae free with this easy use and quiet filter.Ultimate 5 stage filtration for clean healthy waterClear water guaranteedIncludes unique algae stopper padEasy use & easy cleanIf you\'re in the market for a new aquarium filter then you won\'t be disappointed with the Internal Cartridge Filter CF range Famously quiet the CF filter range is a bit of a silent wonder because behind that silent exterior it\'s hard at work.Your CF Filter is full of all the essentials you need for a healthy and clean aquarium. Your water will stay balanced thanks to ceramic tubes which host good bacteria. Mechanical floss cartridges sieve out waste and activated carbon purifies the water of any hidden nasties. And if that wasn\'t enough clever algae prevention spheres help keep that dreaded green glow at a minimum. Cleaning your filter is a dream; simply flip up the hinged lid and remove the old cartridge replacing it with a fresh clean one. It couldn\'t be easier! Replacement cartridges are easily available in packs of 1 or 3.