Rosy Barb Congo tetra Rainbow shark and Ornate Bichir?

no first of all senegal bichirs need 55 gallon tank, and secondly, the senegal bichir will eat the tetras, barbs, and maybe the shark (6"), once the bichir gets to its full size (16"), and they r very predatory fish meaning they eat like piranhas, regardless of the fishe's size, i've seen a 3" senegal bichir eat a 4" angelfish