AQUAPAPA 6 Lbs Activated Charcoal in 6 Media Bags Aquarium Fish Pond Canister Pellets Air Filter Removes odor, colors and organic pollutants. Removes toxic compounds and medications Using one bag for every 60 gallons of water. Fast working and long lasting. Mesh bag size: 8"x 5.5". ** As with all carbon, rinse well to remove excess dust before use**