- Color changes from blue to tan when exhausted
- Vacuum packed to preserve quality and freshness
- Ideal for refilling prepacked DI cartridges
SR Aquaristik bulk nuclear grade Color Changing Mixed Bed DI Resin is ideal for replacing exhausted resin in pre-packed DI cartridges. Resin changes color as it becomes exhausted, letting you know quickly and efficiently when the resin needs to be changed. DI resin is necessary for reducing TDS to 0 normally used after reverse osmosis filtration.