I read an article in Field & Stream a couple years back about putting rice in a paper bag with a few small rocks and tieing a string around the top and then lowering the bag down into fish holding structure such as rocks and or brush piles(condos too). After the bag has had time to soften up jerk on the string and the bag tears open releasing the rice into the water. The article said this will usually turn on fish (crappie) that aren't biting. I guess the rice imitates maggots? I have never tried it but it sounds like it might work if Crappie like maggots.
Kellog