I would recommend the saltwater flush instead of the tea. your flush will happen within an hour and you can go on with your day.
If you are worried about the calories use less syrup. also I only find I need to drink 4-6 lemonades per day, I do make sure that I drink lots and lots of water. Also for the first lemonade of the day I use only hot water and lemon juice. it feels more cleansing to me. Also what I found was that I lose weight on the fast, but also afterwards because I feel clean and energized I don't want to eat as much, the stomach is shrunk, and I crave vegies and fruit and healthy, nourishing food.