While it effectively removes contaminants from your water and ice, this filter also lowers the taste and odor of chlorine while retaining beneficial fluoride.Changing the filter is easy--just locate the old filter, twist and turn it until it becomes loose, then pull the old filter out and replace with the new filter Package Include: Fine Filter 4 For the highest quality water and ice, your refrigerator's water filter needs to be changed over a period of time as its effectiveness at cleaning the water is reduced. For optimal results, you should replace this refrigerator water filter every 6 months to ensure clean, safe drinking water and ice. Your refrigerator will even remind you when to change its filter, turning on an indicator light found near the water dispenser.