Benefits MarinePure Spheres is designed to remove ammonia and nitrite while minimizing nitrates in the aquarium. MarinePure Spheres delivers superior efficient bio-filtration, thanks to its massive porosity and surface area that enhances the growth of denitrifying bacteria inside them. With up to 80%+ open porosity, MarinePure Spheres promotes excellent water circulation, and is much less likely to clog than other bio filter media. MarinePure Spheres is made of inert ceramic, safe for all aquarium including reef. MarinePure Spheres is made of Aragonite (carbonate mineral) composition, similar to natural reef rock, naturally buffers pH and stabilises water chemistry. MarinePure Spheres allows your aquarium to support a larger bioload and reduces your tank maintenance workload. MarinePure Spheres can be washed, sterilised, and reused. Specifications The specifications of MarinePure Spheres: Ammonia and Nitrite removal Safe for freshwater, saltwater marine and reef aquarium One MarinePure Sphere has the same surface area as 1,350 plastic 1.5 inch bio-balls. Vast surface area and high porosity results in enhanced filter efficiency.