... filters: 1.Standard 5 stage RO system 2.Standard filter ,buy and change it easily ! 3.Food grade ... micron sediment filter,it's effective removing dirt, rust and sand particles .Stage 2:(GAC)Granular activated carbon cartridge ,it ... of tast ,odor and color.Stage 3:(CTO)Activated carbon block cartridge,remove chlorine and organic chemicals and reduce ... barium,mercury, sodium.Stage 5:T-33 post carbon filter