Brand New, never used. I bought as part of my RO water filtration setup but turns out I didn't need it. Love the brand so far. Also selling a bag of resin in a separate listing.

Single Stage Bulk Reef Supply deionization canister. Perfect for adding a DI stage to your RO system or adding an additional stage to your current system. Comes with the Canister, Cartridge full of DI resin, and 5 feet of 1/4" tube.

Features

• Perfect for adding a DI stage to your RO system or adding an additional stage to your current system.
• Canister comes with cartridge full of DI Resin
• Cartridge is refillable
• 5 feet of tube
• ¼" Port
• Easily install in less than a minute