And while this isn't about water fasting, it's in response to your joint pain. My other favorite healing go-to is getting rid of parasites--did you ever do a de parasite cleanse with the zapper?
parasites are what's behind arthritis. They love those tasty hard to get to joint spots. And of course they don't do well without food, so I do imagine maybe the change in body chemistry from the fast drove them off or something.
But just from my 20 years of self healing experience and observations. I got rid of hip joint pain, by getting rid of mine. Just another thought. :) Do understand parasites are not just a 3rd world problem.