sodium thiosulphate (you can buy the crystals on ebay) but it doesn't remove chloramines which is the governments latest way to commit genocide on the
population.
basil also removes a lot of fluoride
after a bunch of research I figured out that what you need to find is a "bone char filter". They come in all forms and shapes and sizes. So that part
I can't answer. but search for "bone char filter" and many will pop up. Appearently that's the best way.