I would appreciate you thoughts on this. Usually when fishing specifically for roach I use quite big baits - typically big bits of flake or punched bread, largish particles, 8 or 10mm pellets, etc. On most waters (with patience!) these baits work reasonably well. Yet, there are some lakes where they are useless and the roach will ONLY take small baits!? Why on some waters do only small baits work for roach? It makes it so difficult to single out the better ones. Prebaiting does not work because all it does is encourage the signal crayfish.