weed and tobacco Smoking pot vs. tobacco: What science says about lighting up Tobacco vs. Weed: Similarities and

The industry standards among the most reputable e-juice makers is that the nicotine level should be within plus or minus 5% of the level stated on the label

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13YARN has a fact sheet on understanding substance misuse

Researchers say theres likely no difference in the number of non-serious unwanted effects between users of nicotine e-cigarettes and non-nicotine e-cigarettes

Of course, this process is going to take more time to complete as the amount of ozone being produced increases, please remember this as you incorporate safety precautions into your ozonation process