One problem with salt water flush is that unless your digestive track is fairly clear, it can cause a blockage in your intestines. This is very uncomfortable even painful. So make sure that you are not constipated when you start doing a salt water flush.
As far as pros and cons when comparing enemas and salt water flush I must start by saying a lot depends on the type of enemas you take. Saltwater flushes will clear your small intestines and your large intestines while enemas can only clear your large intestines. Each has its place. I don’t use salt water flushes because I suffer from hypertension (high blood pressure) and I have found that salt water flushes causes a rise in my blood pressure while enemas do not do this, even doing several salt water enemas.
When I first (many years ago) started going on a juice fasts I alternated between taking daily enemas and daily salt water flushes. Soon discovered that salt water flushes cause a raise in my blood pressure so I discontinued them.
I would use a salt water flush during a fast after the initial phase of using other bowl cleansing method but would not use it daily because of the amount a salt that could be absorbed by ones body. I take a daily series cleansing enema during all my fast especially during the first few days. After that I would, if I did not suffer from hypertension, alternate between enemas and salt water flushes.
I hope that I have given you some ideas on this subject. You could also read my blog titled “My challenge” link below.