BRS Bulk Deionization Resin - Color Changing is designed to change color from blue to brown as it gets exhausted, allowing users to monitor its consumption effectively. It is packaged in sealed Mylar bags for ultimate effectiveness and shelf life. The resin reduces Total Dissolved Solids (TDS) to zero and is an essential part of an RO/DI unit. The packaging ensures that the resin remains effective for up to two years without losing its capacity, specifically designed for reefers who process a lot of water.