I have other kidney problems, not stones, but I've done enough research into health/herbs to know that the parsley and Celery Tea is merely for forcing the kidneys to flush, they will not dissolve stones. They are simple diuretics.
Other herbs like gravel root, marshmallow, dandelion, are better for dissolving stones. The method recommended here, I think by Dr. Clark, is to fast and eat tons of watermelon.
I respect Dr. Schulze 's methods of cleansing/healing the body, you can read up on his kidney stone products here: