*4" Filter Bag, 200 Micron, Made in the USA
Very high quality, polyester Felt, Sewn Construction, Glazed Finish, with 4" ringFilter socks are the most convenient form of mechanical filtration. They remove excess food, detritus, organic waste, dust, and other particulates. Removing these particulates from the water column will reduce the amount of organic matter that produces ammonia and other undesirable substances in the aquarium. Filter socks also help prevent larger objects, such as sand, crabs, snails, etc. from damaging pump motors. Regular filter sock use will lower organic levels and result in CRYSTAL CLEAR WATER!  To save on shipping for multiple socks, please click on Avalon Supply to be taken to the store page.