I live in Dearborn, MI, and hookah is an incredibly popular thing here. Within a 3 mile radius of my home, there are probably over 30 different hookah joints. Me and my friends used to hookah all the time in high school, so i have an idea of where you're coming from. You want huge clouds of vapor, good variety of tasty flavors, a long battery life (hence the passthrough), and low nic so you don't overdose as you puff for hours right?
I'm not so sure if this will help, but i would suggest a (dunno the term for non-passthrough) regular battery. You can get a long battery life with a Vision Variable Voltage 900 or 1300 mah Spinner battery. Sometimes hitting a hookah is a cool experience when going out, playing cards, with drinks, etc. This is why i wouldn't suggest being locked in with a pass through. Seeing as to how you want to vape pretty constantly, you could just buy 2 batteries and have one charging while you vape the other. With 2 1300mah's, you could vape probably all day.
As for the tank, i'd recommend the Vivi Nova. The Vivi Nova tank holds ~3ML of liquid, which will last a good while. Even if you have to refill, its very easy and you can do it anywhere in just a few seconds flat. I go through about 1-2ML a day, and i used to smoke around 15-20 cigs a day if that helps you at all. Now this tank is a bit bigger than the battery i suggested, but you can buy a "sleeve" to screw onto the battery that smooths out the transition to make it look more "sleek". I have this exact same setup, so i'm speaking from experience (albeit very little experience
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Regarding E-juice, tastes and whatnot are subjective. There are plenty of vendors who sell low-nic (12mg, 10mg, 6mg, 0mg) high VG juices, but the juices you're looking for (stuff like watermelon, green apple, vanilla are common hookah flavors where i live) are totally subjective. Different people think that difference vendors taste great/awful, so you have to do some self-exploration to figure that one out. There is higher-end stuff like Ahlusion and the Vape Dudes, which cost a bit more but people will vouch for. There is also great flavors for great prices at places like MtBakervapor, so again that's on you.
Link to Vision VV Spinner 1300mah -
Vision Spinner Variable Voltage eGo 1300mAh Battery,Joytec Twist,Twist Battery,Spinner Black-Steel-Blue-Pink
Link to Vivi Nova Tank -
Vision Vivi Nova V2 2.8ml-2.4 oHm Tank Clear. Electronic Cigarette in Charleston South Carolina Stardust Clearomizer.Replaceable Coil Heads
Link to "Sleeve" -
D.C Cone 5ml Tank Dual Coil
Link to charger (dont forget these!!) -
MYSTART eGo..USB-Wall-Charger Combo 500mah Charger
Those are all from the same shop so you only have to pay for shipping once if thats the route you want to take. Hear advice from other members, though. You don't want to settle on the first few ideas thrown at you. Really take your time and watch video reviews of products to see the people actually use these things and get an idea of what you want. Don't be afraid of the research, embrace it. Heres a video that helped me choose to go with the Vivi Nova tank, as he shows you first hand how easy it is to use and clean.
A PBusardo Tutorial - Vivi Nova Cleaning & Rebuilding - YouTube