I went and bought a Pro Tank II today! So far, I really love it. I'm still getting used to filling it upside down. Now, the question I have is do you let these tanks get really low before you refill them? And do you clean yours every time you switch flavors or what? The guy at the shop is kind of hard to understand sometimes...
I never let mine get to much farther than half empty because, I've read that air pressure builds up and can force the juice past the o-ring in the coil head which can cause gurgling.
Those protanks are really nice though, and you can't beat the ease of those replace-able coil heads.
Yeah! I got my tank for about $20. For some reason, I assumed they were a lot more expensive than that. Had I known they were that cheap, I would have bought one a long time ago! The only issue I really had was my own fault. I ruined the first coil I put in it because I twisted the tank off and spilled juice everywhere. Lesson learned, lol. My mom has one and she told me that if she lets her tank become fully empty, it starts to taste like it's burning. I figure I'll keep it half full at least to avoid that. Hopefully, I have a lot more success with this type of tank than what I've had with the disposable tanks. I also like that these screw into the battery from the inside, not the outside. It feels a lot more stable.
You should clean them very often, not only when you change flavors. You need to clean them on a daily basis in order to stay healthy.
I never clean my tanks. All the juice I use just gets mixed in there and the flavor is awesome anyhow. And after a while the current juice I vape gets the upper hand flavor-wise.