In Reply to: Re: Stupid Physics Question posted by Chris on June 06, 2008 at 01:03:59:

To add, be aware that as depth increases so does the partial pressures of the the gases in the mix. So a miniscule CO percentage at a shallow depth may not result in a problem, it could kill at a deeper depth. CO is the silent killer - its odorless and tasteless. Only a CO chemical analyzer would detect its presence and depth increases its impact.

One good precaution for the compressor used for your fills is to check its intake is distant from any internal engine exhaust source and that the compressor is routinely maintained and tested by a certified professional. Any good fill operator would be happy to show you the inspection record.

With summer diving close-by and distant adventures, its a precaution each of us should take to know we're getting good air. Happy bubble blowing!