A: The default assembly tube of Manta Tank is resign material, not easy to break, if you need to change it, unscrew the cap in counterclockwise direction and you can take tube out, you can also use another glass one in package.
A: Heavy vapers should change their coils every five to seven days. Moderate vapers should change their coils every two weeks. Light vapers can get away with changing their coils every three to four weeks. These are general guides, and if you experience any of the aforementioned symptoms, you should probably change your coil sooner.