Boyd Chemi-Pure BlueChemi pure Blue is specially created for fantastic results in reef and marine aquariums. Our NEW proprietary blend of premium, low dust pelleted carbon and high capacity ion exchange resins are skillfully combined to create a superior all in one filter media in a nylon bag. Chemi pure Blue significantly reduces organic compounds and phosphates while raising redox and helping stabilize pH for a healthy, crystal clear aquarium. THE BENEFITS OF USING