ZeroWater Replacement Water Filters – Pack of 4 5 "Effective filters" Mrs Duck 19 January 2019 These filters are amazing. They do the job and filter out all the nasties and leave the water tasting great. Have been using the same filter for 6 weeks now and have not had to replace yet. I do live in a soft water area and get a longer life for mine compared to some areas/regions. They are expensive but worth it.