High O2 left for long periods...

[Garf]

what a load of bollox this thread is. Just analyse the tanks to keep yourself happy and go dive the bloody things. They'll be fine.

[Diving Dude]

Originally Posted by Jay_Benson

..... well Everest is 29,000 feet (or something like that) and most mountainers need oxygen to get to the top due to oxygen depletion. Logically there will be a gradual reduction and so the oxygen must settle out -

It doesn't settle out, there is still 20.9% 02 but it is a lot less dense.
It's P02 that decreases not the percentage.

[deepbull]

Originally Posted by Garf

what a load of bollox this thread is. Just analyse the tanks to keep yourself happy and go dive the bloody things. They'll be fine.

that's ok for you DIR lot to say

dump the gas and keep your LDS in cash!!! as gas is the 1 thing you cant get off the net!
if i had a cylinder of say 80% i would dump it if i hadn't used it in say 100ish years {as we are all going to live longer} just in case the air had gone stale inside it but by then the air out side may be more contaminated anyway!

ffs get a grip just go dive