4" Filter Sock

This 4" filter sock serves as the first line of defense in your aquarium's filtration system. Designed to capture uneaten food, detritus, and organic waste before they reach your sump, it maintains water clarity while reducing maintenance demands on pumps and biological filtration. The 200-micron mesh effectively traps fine particles and prevents debris from damaging equipment. Quality stitching ensures durability through regular use and rotation. Pre-wash before installation for optimal performance.