Filter socks are frequently used on overflow plumbing to help collect and trap free floating debris, excess food, and detritus, improving water clarity and quality. The draw string lets you tightly close and securing the sock to whatever you choose. Using filter socks and changing them regularly odviously helps keep your water clear, but they also help keep debris from entering and ruining your pumps while also preventing detritus from settling in hard to reach places making general cleaning and maintenance easier and quicker. By removing organics and detritus before it has a chance to break down it will directly help reduce the build up of nitrate and phosphate levels. Vertex Filter Sock 300 18cm 36cm long Ringed Nylon
