I Do Have One Tank With Goldfish in It

i do have one tank with goldfish in it. I've got to figure out how to get em out of there. Maybe i got to build a fish trap or something, and just throw the trap in there overnight and drain the tank so they'll go in there. They are impossible to catch, even out of a ten foot stock tank that's a foot and a half deep. So when i go do it, i'm going to have a plan wer to cast nat work insa giant net.