Hi, my last entry is just below yours and as you will see I am on day 9 of a second juice fast. Regarding your question of how much to drink. I have probably averaged about 4 litres of juice a day,mainly vegetable.(careful of too much fruit juices, carrot and beet is sweet enough). I have consumed water in between when ever I felt like it. When you get into the zone your body will tell you what it needs, (food at first, but that will subside),when you are feeling empty and a hunger pang or an image of a big mac pops into your mind drink more, you will soon be satisfied.
Good luck and well done.Oh and dont worry about drinking too much your stomach will definately tell you when it has had enough.