The pg/vg mix will make a big difference on how a tank like you are using will work. Tanks work best IMO with about a 50/50 blend, they wick better than a mainly vg base. So the first number of the fraction is pg and the second, vg. From what i can tell a lot of liquids are around 80/20. Chances are it dosent really matter what the blend is as long as you like it and it wicks well in the tank you are using. More vg more vapor, more pg more flavor. Some companies dont give you an option. Not a big deal to me as long as theres at least 50% vg. I really want you to order a nautilus mini. And if you have a choice, get the 1.6 ohm heads. That will help with the flavor a lot and then we just gotta get you more power.