M.W.
Our family does NOT do flouride (of any type) at all. We also have well water. Our daughter is 4 and the dentist says her teeth are great and to keep up whatever we are doing.
What we are doing is: NO pop, rarely gets candy, juice is a treat, we eat organic as often as possible (especially all produce!), don't eat fast food, and try to have the kids brush their teeth a couple times a week (we would love to do it every day but often forget!!!).
IT is a personal decision that you need to make based on your family lifestyle. We personally just didn't agree with turning a toxic chemical into something "that's supposed to be good for you" because it's cheaper than paying to dispose of it. But lots of people really like flouride so if it works for them, great! We just chose not to use it.
Good luck with your decision.