Deionization Replacement Filters for RO Systems

The Di filter goes after the RO membrane. A DI filter cartridge is filled with a black resin (note: the carbon block filter is white; the DI cartridge has black carbon-looking material). Once the RO membrane has removed most of the impurities, the DI filter cartridge removes the final impurities.

A color changing DI cartridge will change from black to brown as it is used. Once it is mostly brown, it should be replaced. A refillable DI resin cartridge can save you some money. One of our best selling Di cartridges is the Spectrapure Maxcap DI, which contains a high quality Spectrapure DI resin.
20 Results
Marine Depot Color Indicating Mixed Bed DI Cartridge

Marine Depot Color Indicating Mixed Bed DI Cartridge

SpectraPure® MaxCap DI Cartridge (DI-MC-10)

SpectraPure® MaxCap DI Cartridge (DI-MC-10)

SpectraPure® SilicaBuster DI Cartridge - Non-Indicating (DI-SB-10)

SpectraPure® SilicaBuster DI Cartridge - Non-Indicating (DI-SB-10)

SpectraPure® MaxCap DI Cartridge - SuperDI (DI-MC-10HC)

SpectraPure® MaxCap DI Cartridge - SuperDI (DI-MC-10HC)

Aquatic Life Color Changing Deionization Filter for Twist-In Systems

Aquatic Life Color Changing Deionization Filter for Twist-In Systems

AquaFX Color-Indicating DI Cartridge

AquaFX Color-Indicating DI Cartridge

AquaFX High Silicate Removal DI Cartridge

AquaFX High Silicate Removal DI Cartridge

SpectraPure® SilicaBuster DI Cartridge - Color-Indicating (DI-SB-CI-10)

SpectraPure® SilicaBuster DI Cartridge - Color-Indicating (DI-SB-CI-10)

Marine Depot Clear Refillable 10-Inch Cartridge for DI Resin

Marine Depot Clear Refillable 10-Inch Cartridge for DI Resin

SpectraPure Enduro DI High Performance Deionization Cartridge

SpectraPure Enduro DI High Performance Deionization Cartridge

SpectraPure Mega MaxCap DI Cartridge

SpectraPure Mega MaxCap DI Cartridge

AquaticLife Mixed Bed Resin Reverse Osmosis Cartridge

AquaticLife Mixed Bed Resin Reverse Osmosis Cartridge

Kent Marine Hi-S DI Replacement Cartridge - Color Change

Kent Marine Hi-S DI Replacement Cartridge - Color Change

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