Like 33901 I also use Oxypowder at a lower dose for a few days prior to flushing. For several days beforehand on an empty stomach I eat apples and drink lots of freshly squeezed organic apple juice (though any apple juice will suffice for this purpose). I have also been using the tinctures from sensible health ie; chinese bitters, gold coin grass, coptis and curcuma. This preparation has caused my stones to be softer and smaller than
in my first couple of flushes. I would imagine that you would get the same benefits from the chandra piedra.