The Seapora 200 Micron Round Filter Sock is designed to catch any harmful particles or items that prove harmful to sensitive aquatic environments. The sock itself is incredibly fine, allowing water to pass through its small porous surface while trapping anything that may harm or damage the inhabitants of your tank.

Comes in 3 sizes:

200 Micron Round Filter Sock - 4" dia. Opening - 9.5"L

200 Micron Round Filter Sock - 4" dia. Opening - 16"L

200 Micron Round Filter Sock - 7" dia. Opening - 17"L