WTB used oxygen bottle

[loyalrogue]

I'd like to get a small oxygen bottle for bagging corals and fish.
Does anyone know where I could get a used one cheap?
Any idea if the fittings are the same between different tanks for compressed air/oygen/etc. if they're interchangable for filling?

 

[jeffbrig]

I know most bottles are color coded for safety reasons, and I doubt you'll find anyone that will put the wrong gas in a bottle. They may even have different threads to protect against it.

 

[instrance]

Here you go

Here you go

http://search.ebay.com/oxygen-tank_W0QQfromZR40