... shell carbon,coconut shell carbon ect.removing the remaining chlorine,organics,ofor,smell,turbidity,sludge and suspending,particles.( ... .Not performance certified or tested by NSF(7)Reduces Chlorine/chloramines, VOCs, pesticides and taste / odor contaminants( ... your supporting dealerReplace cartridge when rated capacity(2000 gallon chlorine removal) is reached,or when flow becomes too slowInstall ...