I don't think the type of water makes much of a difference, but the Epsom Salts definitely does. I use regular tap water mixed with 4 tablespoons of Epsom Salts . In 8 flushes, I've always had at least 50-100 stones come out, and usually a lot more. I also haven't been very good with following the other instructions such as a no-fat meal on the day of the flush or doing the parasite or other cleanses. But I do take the 4 Epsom Salt drinks and OO (Olive-Oil) drink at the prescribe times, and it has always worked for me. I'm really confused why there are so many people who say they get no stones in some of their flushes?