Seachem Laboratories Mesh Filter Sock with Plastic Collar White 1ea/4 In X 12 in, Small

Filter Sock 250 Micron MESH- 4x12 Sock-Filter socks are a critical component in maintaining water quality in aquariums. They remove suspended debris and detritus, which often lead to excess dissolved organics, nitrate, and phosphate when left unchecked. This makes Seachem Filter Socks an integral addition to any sump and overflow system. This item is made of Polyester Mesh and stitched.