Boyd’s Chemi-pure Green Nano Ultimate Filter Media, Nano helps keep your finned friends’ home in tip-top condition. This all-in-one filter media is specially designed for freshwater planted aquariums and comes in a convenient, easy-to-use nylon packet. While it delivers superior filtration, reducing tannins, odors, toxins, organic compounds and medications, it also leaves behind the essential nutrients your fish need. This filter media contains a high-grade of low-dust pelletized carbon with premium ion exchange resins that help stabilize pH and maintain macronutrient levels. The activated carbon also has a very low ash content that rinses clearly to help keep your aquarium crystal clear.