Activated Pond Carbon removes discoloration and odors in pond water. Our Activated Pond Carbon is made with bamboo carbon, a sustainable resource with an incredible ability to remove discoloration from water. The highly effective carbon also removes chlorines and chloramines, which can prove harmful to pond fish. A resealable mesh bag is included for quick and easy application. One scoop treats 25 gallons of water, and the full bag will treat 800 gallons of water.