Let’s clear the air about some common mistakes. A standard carbon filter (like in your fridge or a pitcher) is great for chlorine and bad tastes. It is not great for fluoride. It might remove maybe 10-20% if you’re lucky, but don’t bank on it.
A Guide to the Best Water Purifier That Removes Fluoride in Australia
What about ceramic filters? Nope. Those are for bacteria and sediment, not dissolved fluoride. And UV filters? Please. They kill germs, not minerals. You’d have better luck trying to filter fluoride out with a pasta strainer. (Don’t try that, by the way.)