The MarinePure Bio Filter Media Sphere 1/2 gallon offers superior filtration capabilities, specifically designed for high-flow environments to effectively remove ammonia and nitrites. Its deep pore structure facilitates the development of low oxygen zones, aiding in nitrate control. Each MarinePure Sphere provides the same surface area as 1,350 plastic 1.5" bio-balls, ensuring efficient filtration in a compact form factor. Ideal for use in canister filters, sumps, and wet/dry filters, this bio media is excellent for biofiltration and helps maintain water quality with minimal space requirements.