... water filter cartridge with high iodine rate using high iodine rate carbon,to reduce the cholorine,odor,bad taste in the water ... .All the carbons are acid-washing and air separation,most ash part have been removed. ... flow capacity of the cartridge,wthout dirty black water coming out.Filter Media:Activated Coal Carbon/Coconut Shell Carbon/ ... :2.5”,4.5” /28mm 20"GAC water filter cartridge