I have done 5 flushes at night and all but the 5th worked really well with hundreds of medium sized stones each time. The last time I did it I had spaghetti bolenese and icecream and I assume thats why it didnt work so well. I didnt mean to but my roommate was making yummy smelling stuff and I couldnt resist. Wont do that again though.
Last night I was meant to do a liver flush. I took my two cups of epsons (I even went to the movies and took one of these cups along so the timing was perfect). I got home and had 1/2 hour until olive oil time so i napped and fell asleep. I woke up at 6am upset that i had forgot but figured I would still give it a go. I had a glass of espon at 6 (not knowing if i had to have epsons two hours before oil or not) and had the oil at 8. I had another dose of epsons at 10. While I recommend doing them at night as you recover much quicker the next day I did get out a lot of stones. Mostly small ones but hundreds of them. I was a bit tired until around 3pm and then had bacon and eggs for dinner and felt fantastic. I eat a protein diet so apart from the day of the flush i have protein a lot. They day of it i have museley and cooked veges.
So it is possible to do during the day but need the right timing.
Looking at what others have said i wonder if the reason they were small stones and not medium ones is that i didnt do it in the liver time 10pm-2am. Who knows but it was another succesful flush.