One 10ml 18mg Salt Nic Shot fills the gap and gives you 60ml at roughly 3mg. Shake it well before the first fill.
Shots are sold separately, so buy one nicotine shot per bottle. That also lets you leave a bottle at 0mg if you would rather vape without nicotine.
A sub ohm kit or a direct lung tank handles this base best. The thicker liquid needs the larger wicking ports that those coils provide.













