FYI...the "muddy taste" doesn't really come from the mud. The fish, and the mud too, get the smell from blue-green algae in the water. When the population blue-greens get too dense, the fish and mud, take on the characteristic odor. You may just have to deal with it, or clean out the fish. Commercial operations often delay the harvesting date until the fish have "cleaned themselves out". An easier method, but oftentimes inconvienient, is to chage your fishing dates. Avoing fishing for a few days to a week after hot still weather or when the ponds plankton bloom is thickest, will reduce the muddy taste in your catch.