Ammonia 1 Ammonia-nitrogen removals 1 Bio-media Biofilters 1 Biofiltration 1 Biofiltrations 1 Biomedia 1 Charcoal 1 Chlorine compounds 1 Coconut shells 1 Conversion rates 1 Nitrogen oxides 1 Oxygen 1 Quality control 1 Recirculating aquaculture system 1 Shells (structures) 1 TAN removal 1 Total ammonia nitrogen removal 1 Total ammonia nitrogens 1 Volumetrics 1 Water quality 1 Water quality parameters 1 Wetlands 1