Neil explained it perfectly. Just some further info.
Clearomizer (includes the Stardust and the Vivi Nova tank)- a plastic or metal tank with a wick and element. Contains NO stuffing. The rebuildable clearos come with heads (coil+ wick) that can be cheaply ($2.00) and easily (10 secs) replaced. When the head burns out simply unscrew the old head out and screw in new head- takes 10 secs. My Vivi Nova heads are lasting about 10 weeks BUT I wash the heads every few days. I've found the Vivi Nova to give the best draw. If buying the Vivi Nova make absolute sure you only buy the Vision brand- knockoffs are problematic. The heads that come with the Vivi Nova are 1.8, 2.4 and 2.8 ohms.
Clearomizer (includes the Stardust and the Vivi Nova tank)- a plastic or metal tank with a wick and element. Contains NO stuffing. The rebuildable clearos come with heads (coil+ wick) that can be cheaply ($2.00) and easily (10 secs) replaced. When the head burns out simply unscrew the old head out and screw in new head- takes 10 secs. My Vivi Nova heads are lasting about 10 weeks BUT I wash the heads every few days. I've found the Vivi Nova to give the best draw. If buying the Vivi Nova make absolute sure you only buy the Vision brand- knockoffs are problematic. The heads that come with the Vivi Nova are 1.8, 2.4 and 2.8 ohms.
