"Can you please advise on how to do the freshwater dip without stressing/killing him?"
And yes, it is a modified Humble post. It's good. I don't/didn't claim it was mine.
I realize his question as I suggested in #5 to perform a 5 min dip. No sense me getting petty over it - he was assuring best way.
Let’s not worry about it lads. Main thing is the fish is okay!