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Hi Eric, > Ok, then once again we find that there often isn't a single solution. In > your case, 100% O2 makes perfect sense, it's the hands-down winner. Since > I don't mix my own gas, and it costs me the same to get 80% or 100%, I'll > stick with 80%. I didn't realize that O2 costs the same as 80% at dive shops! I can't really imagine why...I guess it's the cost of maintaining an O2-compatible booster pump. In that case, sure...go with 80%. However, I still think the differences you noted are physiologicaly meaningless, so "clear winner" might be a bit on the strong side. Also, I have a suspicion (tho nothing to back it up) that pure O2 has physiological advantages that are not accounted-for in decompression software, and therefore might provide an added safety component. But that's just a hunch... Aloha, Rich ******************************************************************* Richard Pyle deepreef@bi*.bi*.ha*.or* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
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