I'm looking for a new tank and my head is spinning. I'm pretty confident I want something from Kangertech as too many people have scared me away from the Kayfuns. I currently have the Big Buddha Mini but cracked the tank and since I can't buy a new glass for it I'm pretty much done with ehpro. Once I start looking at all the Kanger choices I don't even know what the difference is in all of these tanks. Can someone with knowledge fill me in here? I'm looking at the Kanger Nano as I like the 18.5 mm size tank. I definetely want to be able to build my own coils. What is the difference between the subtank, toptank, etc? Thanks!