Hydronix post carbon filter is made of coconut shell granular activated carbon. It is install at the last stage of Hydronix standard Reverse Osmosis filtration system. It can improve water tasting quality and remove any traces of chlorine, organic chemicals, bad tastes and odors due to its highly porous activated carbon. Its Standard Life cycle is Up to 1 Year. buy Online Original Hydronix water products for your Domestic RO Plant.