I haven't tried one, but the Alexapure filters fluoride right out of the box. The Berkey requires you to purchase a separate fluoride filter.
Bone char can remove fluoride. There's an American ebay company "titanwaterpro" who sell it ($48 for 5 pounds).This is something I've been meaning to do forever and have still not gotten up to finding an ideal solution.
The key is to remove the fluoride which those Brita filters won't do, and other fluoride removers might not remove all of it. Furthermore, all of the consumer reverse osmosis devices I've seen use plastic, which is another problem.
Does anyone know a cost affordable fluoride remover that doesn't have plastic components?