Cozy
Achiever
- Joined
- Sep 28, 2018
- Messages
- 2,645
Not sure how adding 72mg to existing 3mg nic liquid would affect but I'd guess just over 4ml 72mg nic to make 12mg strength giving you a total of 24ml liquid, straight forward if adding nic to a shortfill at 0mg, what vg/pg ratio is the nicotine ?