He eats alot of different things. Hikari floating sticks, tetra color bits, blood worms, these are his favorite. They are hard to get eating initialy, but as soon as he hit like 10" everything was game. He just grabs his food and grinds it till it goes down.
Here's some other shots of the tank, again sorry for the glass!
I got him at about 5-6 inches. Started him with crushed color bits, and added live black worms as we went. I would feed my Silver aro the Hikari floaters, and one day the african just started hitting them.