I fully agree with Zachel. Drinking freshly made apple juce prior to clensing helps to soften and dissolve the stones.
As for my fantasic first clense. I did it after only one week of parasite clense with Clarkia . I was taking half dropperfull two times a day. Did not watch my stool thoroughly, so I can't say for sure if I passed any parasites.
I had a few sessions of Shiatsu massage and strongly recommend that before clensing.
I did not do bowel clense. I did a few pure water enemas a day before clense. I did not fast.
I only fast like Zachel, a day before clensing and follow the recipe. I do avoid heavy foods in my everyday meals though.
So as the result of my first clense I had a huge pile of green stones of various sizes without any discomfort during clensing night. I could feel the stones coming out of me like bullets from automatic gun :-)
Advice: get yourself a big plastic drainer that feets toilet seat. You just put it under toilet cover and collect your results during BM. It is very comfortable to wash away everything that is not related to stones or big parasites.
I never had hard calcified stones. But my mother passed some of those following the same system as I, but without massage and parasite clense. It went without any discomfort too.