lamont
Contributor
@mathauck0814:
The opportunity costs of double-checking O2 percentage of the gas include:
If you are diving nitrox, just buy an O2 analyzer and analyze it yourself at the shop and analyze it at the dive site (if those are different days).
I had a dive shop employee slap a 32% sticker on my tanks the other day because the gas in my tanks came out of the same banks as the gas in another tank he analyzed so therefore "they must have been the same" (except, of course, that my tanks weren't empty to begin with).