Aqua one filter pads are specifcally designed to remove the fine particles from your aquarium.  Made of high arcade pored foarm, so the water that passes through the pad will be cleaned of most fine particles.  The pad wills erve as a biological and mechanical filter, essential to the health of your aquarium.  

Key Features:

• 2 Pack
• Part number: 40S
• Suitable for fresh and saltwater aquariums
• Removes the fine particles in your aquarium
• Adds biological and mechanical filtration
• Suitable for Aquis 1000 & 1200 cannister filters