I went ahead and used the hemp oil for the flush...and it was a success! The stones that I got out were very dark green and I even had a few that were a very dark brown, almost purplish color. All of the stones were very small this time. What I liked best about the hemp was that the taste was more pleasant to me and I didn't feel nauseous in the middle of the night like I sometimes do with olive oil. I did screw up the timing of the Epsom Salts for the first time ever and so did not flush "by the book" - not sure how that affected the outcome, but I'm happy that I did release at least some small stones and alot of sludge. I will definitely use the hemp oil again