Our 2.0 Cubic Foot Bonechar Carbon Filter will give you the right amount of contact time to absorb the fluoride in your water. Controlled by the Fleck 5800 SXT Valve, which is fully automatic and simple to program, will Backwash itself every 7-10 days to reclassify the media and remove the risk of tunneling in the media. Adding the KDF to this unit will remove the chlorine before the water comes in contact with the bonechar media, allowing the bonechar to focus mainly on removing fluoride will extend the life of the filter by years.