Quote:
Originally Posted by August
Again though, oxygen is deadly at depth. Unless there is a way to add helium or other inert gas the use of this gizmo would be limited to 15' or less.
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It's almost useless, given your point, for recreational divers. Air is 22% O2, 75% N2, and 2% CO2, plus some other rubbish (I'm off with those numbers, i just forget the exact amount of N2). If you remove the O2, you're only saving 22% volume in compressing the air you'd have to mix. The expense of doing that for a rec diver is not worth it, when a tank of compressed air is almost free. Heli-ox though..... It'd save ya a whole tank IIRC.