Automatic Controller Multi-Media Water Filtration System. Media Activated Carbon (GAC). Filtration system is used to remove chlorine, color, unpleasant tastes, odors and create crystal clear & odorless water. Multi-Media Filtration System used to remove organic constituents & residual disinfectant (especially chlorine) in the water. The process help to remove any undesired odor & tastes as well, apart from protecting RO membrane form getting oxidized by residual disinfectants. GAC comes in a wide range of specifications – careful selection to suit each application is essential. To produce ingredient water for F&B applications, sanitization options of the GAC by hot water or steam shall be made available.