George Glazener made a fish resuscitation tank from an insulated cooler, a point four diffuser, a flow control valve, a regulator and a pony O2 tank. He'd put the HSB in there and let them stay in there a while in the oxygenated water until they recovered, then released them back into the pond.
Maybe Fireishot has a pic somewhere or more info.
esshup (and everyone),
Was the water in the resuscitation tank approximately the same temperature as the lake water - and the recuperation effect was due to high O2 only?
Or was the water a little cooler, to hold more dissolved O2 and cool down an overheated large fish a little? If cooler, I would be afraid of temperature shocking a trophy fish.
I am sure there is an optimal temperature differential to the pond water. I am likewise sure I have no clue as the correct difference!