It's funny to me that when I started out, I stopped smoking immediately, I felt like I was vaping all the time, yet I was only going through 1 ml to 1.5 per day (using CE4's) which really surprised me. Now I'm using Evod's and a protank and I'm up to about 2 ml's a day - I didn't expect to go up (not that I think it's a lot at all - it still seems low!) I now vape 12 mgs during the day and 6 at night (I am terrible sleeper and vape much more at night so I've always been worried about it affecting my sleep!) Since putting my ADV into the protank, I definitely seem to be going through more each day.