Marineland Diamond Blend is formulated to neutralize and remove toxic ammonia and impurities in aquarium water. A combination of Black Diamond Premium Activated Carbon and White Diamond Zeolite, this media blend conditions aquarium water, ridding it of dissolved organic waste as it removes toxic ammonia and chloramines. Ideal for all freshwater aquariums and ponds.Frequently test water for ammonia in parts per million. Add Diamond Blend as instructed and replace monthly or as needed. Aquariums with very high ammonia levels may need Diamond Blend replaced more often until issues are resolved. Remove media once ammonia levels drop.Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland brand has the filtration products you need to deliver on-target, advanced filtration.