Minimum recommended amount for eliminating ammonia and nitrite in an active filter for a typical bio-load. HIGH FLOW LOCATION. Some Nitrate control will occur.
Tank Size Spheres, GEMS or Plates Blocks
50 Gallons 1 GEMS, <2qt or 1 Plate 1 Block
100 Gallons 2qt or 1 Plate 1 Block
250 Gallons 2qt or 2 Plates 1 Block
500 Gallons 1gal or 3 to 4 Plates 1 to 2 Blocks
2500 Gallons 5gal or 12 Plates 5 Blocks
Recommended amount to minimize nitrates in a passive filter with a typical bio-load.
LOW FLOW LOCATION
Tank Size Blocks in passive location
50 Gallons 1 block
100 Gallons 1 block
250 Gallons 2 - 3 blocks
500 Gallons 5 blocks
2500 Gallons 20 blocks
MarinePure BioMedia'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), while helping to control some nitrates.