I had my pond for about (4) years or so before I really knew all what was in it.

To get the best bang for your buck, it really makes a difference to know what all you have going on before you start to mess with things.

It helps to keep a log of what all you catch, sizes & weights, and observations.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."