Fluoride: What it is, and how it's spelled

I was inspired to write this post because of a recent Garden Web thread. It was one of those deals where I started writing a response about one specific thing, and kept adding in other stuff, and the response got longer and longer and longer until it reached the point where I thought I'd be kind of being a jackass if I posted it. Which is one way that having a blog is nice.

So here we go.

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