API® PHOS-ZORB filter media eliminates cloudy water and debris caused by phosphates, helping to reduce maintenance of your aquarium. PHOS-ZORB filter media removes phosphates and silicates, common nutrients found in freshwater and saltwater aquariums that contribute to water cloudiness, and also removes compounds that inhibit aquatic plant growth.

• One pack - size 6.
• Rinse the bag under tap water for a few minutes to remove dust and activate PHOS-ZORB.
• Place the bag in the water flow path of the aquarium filter.
• Replace the bag every two months or when test results show the presence of phosphates or silicates.