ShakaZulu
Contributor
D_B:Correct , O2 is not air , it is pure oxygen , if It's not pure, you can't call it O2
DB
Edit: you guys are fast
Technicalities, who cares about that, lets go dive EAN50 to 500 ft......... I think the original poster was refering to air, in his use of O2, hence EAN21.
PS. I'm going to sleep now, I think we milked this thread for all it's worth, haha. Wait till the DIR dewds wakeup tommorrow.