While just starting out, I've read in several places of the dangers / risks some juices pose to plastic tanks. Some of the articles I've read refer to the "darker" E-juices as being the culprits, though I have yet to actually find anything that defines what physically causes the "juice" to be detrimental. The nicotine level? The VG / PG ratio? Flavors? Atm, I have an PT-2 (glass tank)and an iClear30 (plastic). I'm pretty sure everyone wants their gear to last as long (between replacements) as possible so, with that in mind, would it just be a safe/good idea to use the PT-2 for the "darker / heavier" juices and just use my iClear 30 for lighter juices ? Or does that sound like overkill ?