The best groundbait for bream should be breadcrumb-based and well binding, as its most important task is to carry a lot of smaller particles. Bream can eat copious amounts of feed, which is why baiting up with plenty of particles is key to success.
Two major components are needed for the best groundbait for tench. One is protein and the other is a powerful flavour. By far, the two groundbait flavours that best manage to combine these two components are krill and bloodworm.