This Boyd Chemi-Pure Blue Filter Media helps keep your underwater buddies’ home in tip-top shape. This all-in-one filter media comes in a convenient nylon bag and is specially designed to deliver high-quality filtration and results for both reef and marine aquariums. The premium activated carbon and high-grade ion-exchange resins help reduce organic compounds, toxins, dissolved metals, phosphates, silicates, odors and more! The high-capacity activated carbon contains a low ash content, allowing it to quickly rinse clear. Help reduce the need for frequent water changes with Boyd Chemi-Pure Blue Filter Media.