> Last dive LADY OF THE LAKE, NH. 30ft. 35 degrees. > Can someone tell me why all those other fellows > were wearing Nitrox-tagged Genesis doubles for a > 30' dive? The Nitrox label works as an indication that the tank has been O2 cleaned. You remove the label and a store will probably require that you O2 clean it again. They could have anything in the tank, an old mix that wasn't used or may be just plain clean air. As for the doubles... there are plenty of people that only have one set of doubles... and if they occasionally dive Nitrox, those tanks will be labeled. Besides some people dive Nitrox as a rule. After all the closer you are to the surface, the safer it is to dive Nitrox ;-) -Ed
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