Does mixed bed DI resin really need to be mixed?

Does mixed bed DI resin really need to be mixed?

DI Resin Filter

Easy way to change your DI Resin from your DI Pro 50 or Pro 100

Mixed bed Ion Exchanger

Ion-exchange resin from the Pure water set

Do You Really Need RO/DI? 15 Science Tips on Why Reefers Use Reverse Osmosis for Saltwater Aquariums

Virgin vs Regen Resin

Blue Mixed Bed Deionization Resin (Color Changing)

Dual Bed Deionizer Standard Model - On The Go - Portable Water DI

Mixed Bed Resins overview