My pond is of similar size, and I find that early in the year is the best time to put a big dent in the crappie population.

I can find the majority of my crappie schooled up at a few depths around certain structure, mostly structure that is in 5-10' of water. For my pond, the sunken X-mas trees are best.

Live bait and you can clean up.

I've been doing that for about (3) years now (post finding Pond Boss), and have seen a dramatic increase in the size of my crappie. I've also been adding hundreds of pounds of fatheads and shiners, so that's had an effect also.

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."