Grade E air & modified grade E air

[jbd]

Can someone post the standards for each of these?

[Scubaroo]

Is this it?

http://www.naui.org/ethics/NAUIAffiliateCodeOfEthics.html

First hit on Google :)

[jbd]

like the answer to me:) Thanks!!

[11B3Y]

Which is "hyper filtered?"

Or are both hyper filtered, with the modified grade e air being held to a higher standard?

If I use "grade E" air on my oxy clean tanks, are they still clean?

Or do I have to use "modified grade E"

If grade E is good enough to keep an oxy cleaned tank "oxy clean", then why the modified grade E?

A lot of questions I know --- have been through the PADI EAN course and this was not even mentioned. Frustrated!

Thanks!

Thomas

[metridium]

11B3Y wrote...
Which is "hyper filtered?"
Modified E, I believe.