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

Essentially the DI is polishing off the remaining TDS of the membrane and therefore fewer TDS out of the membrane making the DI last longer and perform better.. The higher the rejection rate of the membrane the longer the DI will last. Highest Caliber Nuclear Grade Media providing optimal performance for the membrane. The cation component is a strong acid sulfonated polystyrene gel type cation exchange 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. ONLY USE AFTER PROPER REVERSE OSMOSIS PRE-TREATMENT This particular green resin is extremely high premium resin compared to the average blue resin. 1 year Satisfaction Guarantee, w/ life time support by aqua technology experts based in California. This product is outstanding for aquariums, laboratory testing, and other applications where ultra-pure liquid is necessary