CHANGE THIS SET OF THREE ONCE A YEAR.
ALSO CHANGE THE FLUORIDE CARTRIDGE MID-YEAR. (Link to fluoride cartridge)
The second cartridge (either FR-1 or BC-1) goes in the middle and removes fluoride, and has a sediment filter. Select the activated alumina (FR-1) or the calcium-based carbon (BC-1). Both options for fluoride removal, activated alumina and calcium-based carbon, do an excellent job. It’s just a personal choice; we do not recommend one over the other. Vegetarians will prefer Activated Alumina.
CHANGE THE FLUORIDE CARTRIDGE EVERY SIX MONTHS. We suggest that you add the additional fluoride cartridge to your order to save on shipping, and so you’ll have the filters you need for a full year.
From The Story of Stuff:“Microfibers are showing up in even more unexpected places. Recently, we commissioned a lab to look for microfibers in bottled water – and we could hardly believe what we found.1 Out of 20 bottled water brands we tested, all but one contained plastic microfibers. Previous studies have also found plastic microfibers in tap water.2 Scientists even warn that we’re likely breathing in these plastic microparticles!3″
Click the link to see How to Change Filters.