Eshopps Round Filter Sock 4" 200 Micron

Designed for compatibility with the Eshops RS-75 and RS-100 sump filtration systems, this filter sock offers excellent mechanical filtration for removing organic matter from your aquarium which might otherwise create unsafe levels of ammonia if left unchecked. This round 4 inch filter bag helps protect pump motors from large objects like sand, snails, and crabs, and is easy to install.