MadiX Universal Big Pack (Silver Carp) The pellets in the Universal series from Madix are based on some classic recipes as well as special feed. What all varieties in this series have in common is the high protein content of the pellets and their strong taste. This combination makes them irresistible to any peaceful fish. The Universal Big Pack is one size bigger, with a larger container and more content, which makes it both more convenient and more profitable. Content: 3 kg.