Today I purchased a boulder that came with 50 nic juice. I am wondering if any juice can go with a boulder or if it has to be those high nic juices (30 and 50 nic).
If you’re talking about the Boulder Rock vape pen, it can take any ejuice, but will likely require a slightly higher nic if compared to sub ohm tanks and the like. But to answer your question, no, it does not need to be high nic juices as the vape can work with any ejuice. Although because it it a low powered pen vape, I would recommend high PG juice for better wicking performance and experience.