Well my 10 gallon is slowly reaching the end of it's "generation"...the fish are all getting a bit old. I have 1 zebra danio left, and he's so lonely

There are 5 others in my 55 gallon, so I want to move him and make him comfortable!
The problem: That slippery sucker is *fast*. I have tried off and on all week to net that guy and move him, but he is just too quick. It also doesn't help that a majority of that tank is planted, so he is hiding inbetween the leaves and I can't get to him without uprooting stuff.
Any tips on catching this guy? I don't want to keep stressing out the fish by trying to catch him all day.