Double stitched nylon filter medium bags. For use with any type of granular filter media such as: phosphate, ammonia, nitrate or silica removers or activated carbon. Includes 2 nylon ties. Use the Boyd Chemi-Bags – 2/pack 5inch x 11. 5 inch to help your filter media in removing pollutants and impurities in aquarium water . Each of these bags has a thin mesh-like texture which can sift even fine particles in the water. It is specifically designed for any granular filter system like silica, phosphate or nitrate remover. It works well with Purigen and Chemi-pure Elite.

Boyd Chemi-Bags 2pc