Contains an excellent blend of resins and activated carbon that removes aquarium pollutants including colors, odors, heavy metals, and toxic gases.

The API BIO-CHEM ZORB filtration medium makes aquarium water crystal clear. It also removes impurities that block light for improved coral growth in marine water and for plants in freshwater aquariums.

• Rinse the pouch with tap water to remove dust.
• The bag does not need to be rinsed.
• Place the pouch in the filter's water flow.
• Replace every 2 months, or sooner, if colors or odors are detected.