Fasting during colonic?

Hello!

I have been 70-95% raw for the past 6 months. (Started with lower percentage, and have increased bit by bit.) I have decided to get a series of 3 colonic hydrotherapies to help further cleanse out some junk from previous bad habits.

The appointments are scheduled for a Monday, Wednesday, and a Friday, all in the same week. Would it be beneficial for me to do a fast on one or all of these days? Or possibly a juice fast? I'm not ready for a weeklong fast, as I have never even fasted for one day yet.

Any suggestions or advice would be greatly appreciated! :)