Are you conflating fluoride and chlorine? Or are you gulping water down your throat at swimming pools? If it's the latter then you really should stop doing that.

I am not the OP, but you may not be aware that many, if not most, cities have chlorine added to the tap water. I have read comments on HN about people leaving jugs of water in the fridge so the chlorine is off-gassed.

What?

He's saying that this ubiquitous modern stuff kills gut flora.