My favorite bait for pond bass, if you're not against using live bait, is a live night crawler. No sinker, #6 or #4 hook, hook the crawler through the head once and let the rest dangle, cast out and let the crawler slowly sink to the bottom, after crawler hits bottom reel in and cast again- don't work it back in or the bluegill will peck the crawler off. If a bluegill or small bass bites part of the crawler off, put a new crawler on - big bass don't seem to bite a part of crawler very much at all. The bottom line is that your presentation is a live crawler hitting the water and slowly sinking to the bottom. Yes you will need a bunch of crawlers because of bluegill and other smaller fish tearing at the crawlers, but, this technique will pay off.