There is a quick way. I could have all those little guys caught within 5 minutes, no problem. The only thing is you need a light that turns off instantaneously, not slowly like a MH.
Just feed, and have a net ready. Turn off the light (or have someone else do it) as the fish are eating from the surface. Scoop at last known location of fish/fishes. You will have at least one if not more damsels in your net. Repeat as necessary.
Works like a charm, and it's fast.
The other fast way is hook and line.
The other fast way is make a "cave" from a pitcher, or other suitable container. When the fish swim into the "cave" remove it.
A large clam shell works great for this.
Catching fish is easy if you know the tricks.
Besides these, the methods outlined above work will too.
Jim