Cleansing and fasting advice?

I'm thinking about cleansing my body by fasting for 3 days (2 days juice, 1 day water). I don't want to do anything too intense / extreme, but 3 days seems like it would be a good way to give my digestive system a break. Before starting fasting I plan to do a high fiber diet and fruit only pre-fast diet for a few days. Also after fasting I would take a couple days doing a fruit only diet to transition back to solid foods slowly.

Some questions I could use good advice on:

Should I use any supplements during the 3 day fast? The main ones I'm wondering about are: 1) probiotic capsules 2) digestive enzymes (from papaya) 3) herbal fiber powder 4) anti-candida/parasite stuff 5) psyllium husk fiber 6) multivitamin powder

Any tips to maximize digestive healing effects?

How beneficial would getting a colonic be, maybe on the 2nd fast day? My doctors office has a women that offers them there, though I don't want to get one unless it's going to help me cleanse and feel noticeably better.

Good advice is appreciated. If you reply, please give an indication how confident you are on your view and why.

Thanks,

Tom