How old of air to breath?

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runway1

Contributor
Messages
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Location
Orange County, CA
# of dives
100 - 199
With the rain here in socal, and the general water conditions, I haven't been wet in 3 months. I do have a 3 month old fill, though. Would you use it or empty it?

Tank is a steel 100 and was tumbled last Fall. Thanks!
 
Why wouldn't you use it? It's not going to get "stale" in an air tight tank and it's certainly not going to grow any gross stuff in there unless you've somehow contaminated the inside of the tank. If you want to waste the cost of a fill I guess it's up to you, though.
 
Used air in a tank that was in storage [someone's basement] for 3 years AT 2900 PSIG (not my tank, then)...NO PROBLEMS....
 
Why wouldn't you use it? It's not going to get "stale" in an air tight tank and it's certainly not going to grow any gross stuff in there unless you've somehow contaminated the inside of the tank. If you want to waste the cost of a fill I guess it's up to you, though.

Not quite that simple. Air isn't pure. It has moisture and organic stuff. I'm not an O-chemist, so I thought I'd ask.:D
 
Your problem would be if there was enough amount of moisture in the tank to start significant rust buildup. That oxidation process will take O2 out of the air. It would have to be really bad to make that a problem for you, though. I wouldn't give it a second thought in your case.

By the way, if you normally get enough moisture and organics in your air to cause a problem, you need to start using a different fill shop. Your air should be ultra pure and dry if it is being properly filtered.
 
Not quite that simple. Air isn't pure. It has moisture and organic stuff. I'm not an O-chemist, so I thought I'd ask.:D

I could be wrong but I'd wager that air for fills doesn't have the same moisture content, IE it's "dehumidified" by the filtering process, at least a little bit. Either way, if it had a lot of moisture in it (and you be able to tell when you breath it) I'd be looking for a different shop for my fills.
 
Not quite that simple. Air isn't pure. It has moisture and organic stuff. I'm not an O-chemist, so I thought I'd ask.:D



Not sure about your air but here is ours:
airreport.jpg
 
I would not worry if you got air from a shop like above 25ppm is an very, very small amount of water, and most organisms will not like steel as a base to grow from.
 
https://www.shearwater.com/products/swift/

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