Spare air VS pony? Why?

[hambleto]

A nitrox spare air sounds like a good way to part a fool from their money.

Thank you for answering my question. I hope I do not bug people with questions like this, I do searches before I post and I try not too ruffle too many feathers in the process. The wealth of knowldge and the willingness to share it is amazing.

Thank you again,
Ben

 

[LUBOLD8431]

Wow, I cant even believe they even make the spare airs anymore. What a joke. And a Nitrox one too??? Thats just hilarious...

I would think most people are smart enough to know that the spare airs are a waste of money...

 

[Don Burke]

http://www.spareair.com

I think they stopped making the double unit.

 

[hambleto]

O-ring once bubbled...

You could....depends on how deep you are and what nitrox blend is in your pony.

I take it that would have to do with the Partial Pressure thing that causes Oxygen Toxiticy? (I have not taken a nitrox, I have just been reading around here, please correct me if I am wrong.)

 

[O-ring]

hambleto once bubbled...


I take it that would have to do with the Partial Pressure thing that causes Oxygen Toxiticy? (I have not taken a nitrox, I have just been reading around here, please correct me if I am wrong.)

You are spot on again...higher partial pressure mixes have shallower maximum operating depths (MODs).

 

[Bob3]

... when you can get a full 20cf pony with reg and octo for ~275?

There was just recently some brand new bottles on ebay, $80 each for your choice of 6, 13, & 30 (I think) cubic feet.
Tack on a decent used reg for another $100-$125 & you're in the $200 range for a great bailout system.
Screw the octo, invest in a small SPG instead.

What a joke. And a Nitrox one too???

Gee, didn't they have a trimix model too? (might've just been a bad dream I was having) :tease:

 

[Drew Sailbum]

After all, it is has its "[t]ank finish in Neon Yellow for safety." :haha:

Nahh! Who's kidding whom? I thought the nitrox line was a joke until I looked at their website. Jeesh!

 

[paulwlee]

Looks like the intention of the Nitrox version is not to have it filled with Nitrox because it's good for you, but is for cases where that's what the diver has on his/her AL80(or whatever) tank. This is because a diver fills the spare air before the dive from his/her own tank. With this in mind, the MOD argument is a little off base, because the MOD will be the same as for backgas anyway.

I didn't realize this either until I went to the website to have a look, so I was also thinking that it was funnier than it really was. I never used a spare air, so I had the preconception of filling it from a compressor beforehand, but evidently filling from the tank that's about to be used is how you are supposed to use it.

A seperate 'nitrox Spare Air' is of course pointless according to current conventional wisdom, but many manufacturers did sell 'nitrox regulators' for use with EANx<40% until a few years ago. Seems like this is the same sort of thing. But it's surprising that they're still selling it.

 

[Scuba_Vixen]

P T Barnum was spot on.


Darlene

 

[Don Burke]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3632659998&category=1300