Flouride is much harder to get rid of than most other things.

You really do need to test the water first to know what you're dealing with. Not having a clue can lead to less than satisfactory results.

In your case, you might need to add an RO section to get the results you want, but, in order to make an RO filtration setup work, there's a bunch of prefiltering that should be done in order to ensure that the RO membrane will last.

You'll also need to decide how much filtration you want for the whole house vs. point source filtering for drinking/cooking. While house RO can get silly expensive.

The other thing with filtration is that you can take out so much that you really should re-mineralize the water used for drinking/cooking.

As for fluoride, for a long time I wondered if it might calcify arteries like it calcifies teeth. I'm not concerned about that anymore based on a lot of things:

1. They have found the molecular mechanisms that transport apoB under the endothelial layer (and back). The atheroma formation mechanism is now known, and fluoride and sugar-damage simply aren't part of it,

2. Calcifying an existing atheroma is a good thing. Soft ones may rupture and cause an event, whereas hardened ones are much safer. Over time the vessel widens and/or new capillaries are formed that bypass the narrowing.

But I'd still use a carbon filter because of the other stuff, and for taste as nostr:npub1amtt4ht2vwuxc4lydp6tkd0w6a2kzstmnxltwpzwc20c2pgp7uzq2gc0mj mentions nostr:nevent1qqspx4vau0zmggqzuzfxa0jr6rdy7w8swk72eh5lq8526gudxfny7hgprdmhxue69uhkwmr9v9ek7mnpw3hhytnyv4mz7un9d3shjqghwaehxw309akxztnjv4kxz7tpvfkx2tn0wfnj7qg4waehxw309ahx7um5wghx77r5wghxgetk9u783p29

I live on a farm and catch rainwater. So (pesticides, solvents, pharmaceuticals, chlorine, flouride) aren't much concern to me. I'm more concerned with (grit, leaf litter debris, algae, bacteria). To that end I have two filters. The outer filter is 20nm pleated. The inner filter is 1nm dense mesh.

When I had my water tank cleaned and they refilled with chlorinated water, I swapped the inner filter for a 1nm carbon filter. But it's been swapped back now.

If I were to do it again, I don't think I would change it.

if you’re trying to get rid of chemicals then carbon

for bugs they have the UV light pipe filters

you can daisy chain