When I do coffee enemas to get out Stones there seems to be no need for Citrus however, there have been times that I also downed (by mouth, this DOES NOT go into the plain Coffee Enema) the juice of a Lemon or two along with Epsom Salts , Oil and Lecithin, to help along the process.
You always need the Citrus in a regular Liver Flush even in the Classic Coke Flush.
Lecithin pretty much acts like a slippery Oil but its not acidy like Citrus.
You can do both Lecithin and citrus with if you want. I don't go by an exact amount. You can vary your amounts of ingredients and still get results. Basically you will find out what works for you.