I was wondering the same thing as this is the second time this has happened to me. I was worried about the flush not being successful until I saw the large stones and the large quantity of smaller stones. As it sat in my system for over eight hours, it must have done SOME good.
I figure my system used what it needed and had me spit up what it didn't. I did not, however, check to see how much that was!
Has anyone else cut back on the amount and still produced a successful flush?