Cartotanks use either pre-punched cartomizers, or you can use un-punched cartomizers if you punch them yourself with a carto punch tool or slot them with a powered Dremel tool. The cartomizers are replaced in the cartotank every 2 - 3 weeks.
You can't replace the atomizer and the filler in the cartomizer. They are not constructed to be rebuildable in that
sense. They are considered a one-time use item, and disposable. Cartomizers are relatively inexpensive, generally $2 each for the pre-punched variety when purchased online. They will be more expensive in e-cig B&M stores.


pre-punched cartomizers/tool-punched cartomizer/carto punch tool