At 200 feet you should be using trimix which should flow better than air at 130 because of the lower molecular weight of the gas.
Who said I wasn't? You just assumed that... Regardless, how would you know when I get narced? I frequently hit depths between 200-240max before gases get switched. I can tell the difference between a POS and a good reg at that depth despite what you say. If you like we can do a blind test, I see your in miami im just up the road in west palm. Anytime let me know. I usually head out of Ft Myers to dive on some of the oil platforms, mostly for spear fishing. Well have to do it a couple of times, since I would have 50/50 shot of picking the right one. I wouldnt want anyone thinking it was just luck.