i dont know about you all but at the wal-mart where i live (Kentucky so im sure everyone else has had this for probably 10 years) we have a reverse osmosis machine. water from the machine costs a mere $.33 per gallon... since you were saying reverse osmosis is the only way to totally rid water of fluoride (and probably a bunch of other junk) id say that that would be your best bet. they even have new containers so you dont have to use a old one. all in all its gonna cost a minute fraction of what your WC loop did.