2 Pack Individuals Inline Deionization (DI) Canisters for Universal RO/DI Systems - 1/4" Inlets | Engineered for Zero TDS Ultrapure Water | Easy Filter Change

This product is great for aquariums, laboratory testing, and other applications where ultra-pure water is necessary. 1 year Satisfaction Guarantee, w/ life time support by water technology experts based in California. ONLY USE AFTER PROPER REVERSE OSMOSIS Individuals This particular green resin is extremely high quality resin compared to the average blue resin. Mixed Bed DI Color Changing Filter In Clear Housing.The anion resin is a Type I strongly basic gel resin with an indicator dye that changes from blue to brown as the resin exhausts. The cation component is a strong acid sulfonated polystyrene gel type cation exchange resin.