Boyd Chemi-Bags are tough, double-stitched nylon pouches that serve as universal filter media bags for most aquarium systems. They are excellent for containing any granulated filter media, including activated carbon and phosphate, ammonia, nitrate, or silicate removers.

• Double stitcked nylon filter bags for most aquarium systems
• For use with any type of granular filter media
• Holds phosphate, ammonia, nitrate, or silicate removers or activated carbon

Each bag measures 5" x 10.5" and will fit most filtration systems.