i have had my African brown knife fish for a couple of months now. When i got it, it was about 2.5 to 3 inches long. Now it is close to 5. I have been feeding it frozen blood worms, frozen brine shrimp, flakes, and cichlid pellets. How big does it have to be before i can feed it market shrimp, or other bigger foods? and i also have the same situation with my senegal bichir. they are the same length.