1) Epsom Salts our fine as long as there is waste in the small intestine. Andreas Moritz says it's fine and that's fine by me.
2) I don't use lemon juice(allergy to citrus/lemon), I use apple juice and coca cola.
3)I've have only done colon cleansing with Oxypowder . Have never done any parasite/zapper routine so wouldn't know the benefits. It hasn't stopped me getting stones anyway! good luck.