MarinePure BioMedia Spheres 2 Quart

Denitrification Recommended MarinePure amount to minimize nitrates in a passive filter, for a typical bio-load. Recommended Minimum MarinePure Amounts Tank Size Blocks in passive location 50 gal. 1 block 100 gal. 1 block 250 gal. 2 blocks 500 gal. 3 blocks 2,500 gal. 15 blocks 10,000 gal. 60 blocks * MarinePure’s thick blocks are designed to be used in passive systems to control Nitrates (like live rock). If used in active systems they will eliminate ammonia and nitrites (nitrification).