If you had a small 1/4-1/2 acre pond and you wanted to be surprised at the catch every time you dropped a hook in, what would you use to have a
"Sustainable/balanced" population?
Using those terms loosely
It is hard to beat hooking on to a SMB. Seeing one doing a "Michael Jackson moon walk" with its tail the only thing in the water and jump out of the water repeatedly is pretty exciting. That is usually right before they throw the hook out of their mouth.