You are correct G1sammons; I do have a natural bias against hookah and see it less versital and more dangerous than using tanks. My earliest concerns were about the irresponsible way hookah was being promoted by journalist(s) without identifying the inherent danger(s) of using them to people who had never dove. All forms of diving are inherently dangerous and non forgiving- you can drown in less than two inches of water. I take issue, with your statement that “ The real truth is it's the diver who usually gets themselves in trouble not there equipment “! In my opinion “.Faith is the Hunter”: There are also equipment failures, faulty designs, human error by support personnel, and the unpredictability of nature which have resulted in the death of highly experienced divers. I more than heard about this, several of these fatalities/ dehabilitating accidents (which happened (deep free diving with snorkel, scuba diving, and hookah), were associates/friends of mine. Also, I saw no mention of using a capable hookah tender or experienced diver for safety, in case something goes wrong I do appreciate, the responses which I have received and would most likely use hookah for metal detecting based on posted replies.