Oxygen tank 91744 ship ok/ pu preferred

[the animal guy]

I need a small tank to pump oxygen in the bag to ship a few fish. Who sell?

 

[nguyen_mpn]

Craigslist bro.! I saw a few for sale in your area. Just make sure hydro test is up to date.

 

[the animal guy]

I want to buy the one that has the pump so I can pump into the bag. Or do they all come like that? Im new to this stuff.

Anyone can link me to an oxygen tank I can buy ready to pump into the bag?

Ebay or whatever. I found oxygen tanks but not sure if which is the right one.

Anybody know this stuff? thank u