I personally do not know very much about this topic, however mushrat knows a great deal and you should just wait for him to chime in, or if you search there has been many threads about starting a hookah lounge and they will help you out.
how did you clean your pvc pipe? Earlier today I made a custom hose and the handle is pvc but while im smoking it tastes really plasticky so im trying to get rid of that taste lol
you do whats in the parenthesis first so (1+2) which equals 3
then you do multiplication which is 2 * 3 = 6
then division which is 6/6 = 1
according to the order of operations
I don't know about too much ventilation but if you put too many large holes then it will almost be like your coal is directly on top of your shisha and you do not want to do that. How are you packing your bowl ?
in the article it says that hookah has more tar then cigarettes but on all of the shisha containers I buy say that it has 0.0% tar. I dont understand how that is possible because from my understanding tar is produced when the tobacco is burned or lit on fire such as a cigarette, but I think that the coals on hookah are just heating up or cooking the tobacco therefore not producing tar. Someone correct me if Im wrong for thinking that.