Meet activated alumina. It’s a fancy white powder made from aluminum. It’s like a sponge for fluoride.
You can buy a filter with this stuff. Water flows through, and fluoride waves goodbye. It’s efficient, but you have to replace the media. Otherwise, it gets clogged and lazy.
Fun fact: This is the same stuff used to dry out natural gas. So your water gets the VIP treatment. Fancy.
How to Remove Fluoride From Drinking Water: Practical Methods