The Fluval C2 Power Filter features 5 stages of filtration: 2 mechanical, 1 chemical and 2 biological stages for top performance. The C2 Power Filter is equipped with the Fluval C2 Poly/Foam, Activated Carbon, C-nodes and Bio-Screen pad. An integrated trickle chamber filled with C-Nodes is where biological filtration is super charged for fast and efficient nitrification. The mechanical filtration is performed by a dual layer of foam and polyester, and is easily removed for quick cleaning. The patented recirculation grid enhances mechanical filtration when the flow rate is reduced. A convenient chemical insert basket directs water flow to maximize toxin removal. Maintaining only one stage at a time will preserve beneficial bacteria, resulting in a stress-free environment, while ensuring aquarium water stays clear. The Fluval C2 Power Filter clips on, and is ideal for use on aquariums up to thirty gallons. It is the perfect way to provide your fish with refreshing and clear water. For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.