6 Pack - 200 Micron Water Polishing Filter Socks Instantly improve your water quality with our all new 200 Micron Water Polishing Filter Socks. These highly durable mechanical filters contain 200 microns that serve to trap uneaten food, free floating particulate matter, micro-bubbles, and even dust from your aquarium. The pre-molded hangers are made to fit the NUVO Fusion Aquariums for zero bypass, easy servicing, and maximum reliability. These Micron Socks will serve to give you a cleaner and cleaner aquarium, resulting in polished water all while simultaneously removing heavy amounts of organic matter that produces ammonia and other undesirable substances in the aquarium. So reward yourself by rewarding your tank with the Innovative Marine Water Polishing Filter Socks.