Saltwater flush Help

I have just started my first master cleanse and am on day 4. However, I have not done a salt water flush yet. I was reading and found that ingesting salt may cause a low potassium level - that can even cause harmful side effects , including death. I know lots of people have done ot safely. But, I noticed that 1 teaspoon of Sea Salt provides 100% of your needs of sodium. I was wondering if I could just take 16 ounces of water with 1 teaspoon of Sea Salt ?? would that still work??? Also, I have been using orgain pre squeezed lemon juice for the first three days and now am making fresh lemon juice myself b/c of what I read in the forum? Do you think I need to extend my fast a couple days or is that alright? (since now I am using fresh lemon juice?) Anyways, also are herbal stimulant teas safe? I was going to try that instead of the salt water but I found a lot of dangerous info. on that as well, saying it messes with your intestines and can also cause dangerously low potassium levels. Also, is it o.k. to use cleansing herbs? I bought a "internal cleansing" herbal capsules? Should I wait till after the fast to take them or can I take them concurrently?
Thanks!