Hi,
In order not to hijack another thread I started another...
I must confess that I did not know that the residual gas if/ when oxygen is produced is Argon. Is this because of the process, or? Why? I thought Argon was a non reactive gas. Is Argon harder than other gases to filter out?
edited:
This was pointed out in Ales Deas post no 253 in this thread
http://www.rebreatherworld.com/rebre...idents-26.html ..."Do not allow users to use anything other than 99.5% O2. Too many fools do not realise that the other % is argon, and that argon builds up and then anaesthetises the diver."....