Reel McKoi
They have a tablet that you can dropin the bagged fish and it creates
O2. I have seen it used down on the coast for bait fish, and I do
remember it stated for freshwater or sal****er....Also a couple of
shots of Amquel or Stress coat in the bag, use a small hand pump or
such (not an air compressor that has oil in its crankcase) to inflate
the bag, do not use your own breath/air.

I have just whats needed here, a concentrator I found along the
roadway. It is used for o2 supply for people..evidently it fell off a
vehicle or somehting, but it works like a champ and have had it
tested.....however you can get a small tank of O2 for very little
money and it goes a long way. If yu have a petco or petsmart talk to
their fish people and ask what they do with their foam boxes......Our
both stores here as well as the mom and pop LFS all throw them out. I
get a load of them all the time.....they come n handy for lots of
stuff. So that may be a source for foam insulated boxes. As for
bags, I use dunnage bags......they are super heavy duty and I double
or triple bag. I just asked my wife to grab some at work as they use
them for dunnage in the trailers.......and they are almost bust proof.
Securing them is harder but can be done with a little practice. I use
a elastrator (used to castrate male livestock by way of small hevy
duty rubber bands.......and this is how a lot of vendors close their
bags up. Another is get a box of #1 or 2 hog rings at the local farm
and feed store, twist bags up tight, and use a hog ring or two on the
bags twisted end squeezed closed with a regular pair of pliers. Works
just fine. I really do not ship any fish much anymore since I quit
farming out tropicals and wakins.......One thing I had going for me is
I am only a hop skip and jump from airport, but I still relied on Fed
EX to ship them......and since they are open 24/7 they used to tell me
when to have them there so they would make the load to the airport
with little laying around. In the few years I shipped fish I had
relatively few problems......On average its gonna be about 25-35 bucks
for a box of fish, be it one fish or 100 fry......Koiphen.com has a
few good articles on shipping fish.....