Think Again, I was also thinking of doing it in the middle of the day, because when I saw the directions, if you take Magnisium Citrate, 10-12 oz. plus it says to drink another glass of water on top of it, you will be up all night with all that liquid!!!!!!! I think I will do it during the day as well. My question though, do you think it would be ok to drink a glass of epsoms to clean out before the flush? That way, you can see the stones, and actually see the results more. What do you think?