Yep, as Pure said anyhting that gets big enough they cant eat it. From what I have heard when they are full grown their mouth is about the size of a quarter. (Im not 100% thats true, but its got to be awefully close.)
Pictus cats are semi aggressive predators. Not a good choice for an African tank. I need to know how large your tank is before I can offer any suggestions.
Excuse my ignorance, but what would be wrong with an altum angel? I looked in the profiles, but couldn't find it... I guess they're likely aggressive, but then again, so are his picti.