I happen to be an experienced, and knowledgable faster, but aside from that Logic was the reason for that statement. if the Liver, Gall Bladder are plugged with stones, they need to be cleaned out so that the toxins can get out. Not only that, but by doing so the fast can be done much easier. Actually this would apply to the lymph system as well if it were stagnant for some reason. You must have visions of the water fast being like hooking up the garden hose to your mouth, and the water flushes everything except your organs out of the body.

The fast will do wonders, but it needs all the help it can get. An Analogy might be making apple sauce in the blender. If you put the whole apple in at once you will likely  not get the job done, so you cut the apple up into pieces that the blender can handle comfortably.

There is a reason that the original poster didn't achieve the goals of clearing the muck off his tongue, and eliminating his skin condition in 46 days of fasting.

To end this reply, I will tell you that it matters not to me whether you, or the original poster agrees with anything I write, or tries any of the suggestions.  I can assure you my heart was in the right place when I did make those suggestions, and that's what counts.