Get a large plastic bag from your local fish store that they ship the fish in . when you catch the fish in the bag by letting it swim into the bag then before you lift the bag out of tank let some of the water escape so the bag is not to heavy,then put it in a cooler and fill it with a siphon till the fish is covered with about four inches of water. Make sure that you do not make the bag to tight or the fish can break threw the bag. It is also a good Idea to lower your tang water to 50 percent and also purge your fish for two days before you plan on moving it,its a good idea to purge your fish two days before your ready to move it,that way the water will not get fowled by fish waste and there will be more oxygen in the bag.and make sure the bag is as long or longer than the fish so he does not jump and break his back,if you cant get the bags from the fish store then buy heavy duty contractors bags. when you get to the pond were you are going to keep him, put the cooler on a table a siphon of the water of till the fish is just covered and start adding pond water till you think he is the water has more than doubled then use you siphon to take three quarters of the water out of bag lift it out of cooler and put in pond and let it fill with water the open bag and let him swim out.Good luck and make sure you keep rubber bands on at all times,except when you go to let him out of bag