1) What is h20? Anyhow, I ordered a p & B shake online ( I live in Taiwan and finding these ingredeints here was impossible) It came in powder and I was intructed to mix it with juice, followed by the same quantity of water afterwards. So juice and shake can be mixed.
However some people have reaction to fruit, which must not be your case if you can still have ice cream!!!
2) Probiotics are a good choice right now, you want is to compete with candida so as to replenish your natural intestine flora. Furthermore, the shake is going to scrub your intestinal walls and release a crust of toxins. The probiotic will help to deal with the potential damage done by toxins.
3) Liver cleanse, answer will vary. BUT MAKE SURE YOU FAST BEFORE you do the liver cleanse.