try using a smallish (not necessarily crappie sized) spinnerbait. Either white or chartreuse/white will do. Booyah makes the pond magic which is the perfect size, but all the spinnerbait makers make smaller version of the same thing. White is good if the water is clear, but here in alabama the water is generally a little muddy/murky so we use the char/white.
I recommend a spinnerbait because it covers a lot of water but the MAIN thing is that you won't have trouble keeping it off the moss on the bottom which causes all kinda hell when fishing worms. Just last week I caught a couple on the spinnerbait in water less than 5 feet deep with a ton of moss on the bottom just reeling it fast enough to clear bottom.. If you have a hard time getting bit on the smaller spinnerbait then switch to a rooster tail or other inline spinner.
I hate to admit they catch the crap out of fish because I feel like it takes no skill to fish em and imo they should be fished by those still using a snoopy rod, but truth be told the old guy who fishes with me won't tie anything else on and he always outfishes me for any species in the water. Hope this helps!