""...have there been any studies on water clarity and feed training with BG?"" Not to my knowledge. It makes sense that if the fish can see a food item from a further distance in the water they will more likely notice its presence, investigate it, and attempt to eat it.
That would be a very good science fair project for a high school student or term paper for a college biology student. Or it would be a good fish project for a PBoss forum member and report the results here or in Pond Boss magazine.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine - America's Journal of Pond Management
