I used to have one around 2 feet as well.. that bugger put up a good fight & jumping out of the tank.. Not the best way to move a snakehead which is why it's recommended to keep large monster in a tank big enough for lifetime..
Maybe try get a polystyrene box with holes on the bottom & try to get the snakehead to swim in it.. then close the top(make sure it's tight) & wait for the water to slowly flow out.. Then slowly lift the box out of the tank..
Just an idea..
2 for juvy & 1 for adult.. 1 is recommended cause they get big real fast depending on how much you feed..
I was amazed by my micro's growth when I used to own one.. it never seem to be full, always hungry & active too..