About 1 1/2 pad of camel filters, smoked for 27 years. I started of with 24 mg nic juice, but now that I am into rba's and both regulated and mechanical mods, and vape at high watts, I have had to reduce my nic level to 12 mg. Contemplating dropping it some more, my builds are just getting to good, and getting a good nic buzz with the 12 mg.
I went to DIY juice several months ago. After starting with my first re-buildable atomizer, and increasing my watts vaped at to 15 watts, I noticed a dramatic increase of juice usage, and had to find a way to lower my costs and worrying about running out of juice. Have been very satisfied with my recipes, and developing more ADV's as I go along. Generally have 4 or 5 different flavors on hand at all times. When I get low on one flavor, I just mix up a new one.