PRO Series Mixed Bed DI Resin (Color Changing) - Part 3. Changes from Purple to Amber when exhausted. This cation mixed bed color changing resin can be used with any type of RO/DI system that utilizes refillable cartridges and is great at removing calcium, magnesium, aluminum, iron, and other positively charged ions. Two sizes available: 1.25 lb Single Cartridge Refill, 7.5 lb Bulk Package (up to 6 single cartridge refills).
