Juices turns dark over time as it settles, that's normal..
It turn darker in tanks due to the heat from carto while vaping, that's normal too, juices like vanilla will turn very dark brown even..
I have seen some juices that separates like the one in picture, I'll just shake it up and try on a drip..
But if it worries you, just discard and get a new batch..
It turn darker in tanks due to the heat from carto while vaping, that's normal too, juices like vanilla will turn very dark brown even..
I have seen some juices that separates like the one in picture, I'll just shake it up and try on a drip..
But if it worries you, just discard and get a new batch..