I take back what I said earlier about corys, they probobly won't mix well with the pictus!:wall:
Pimelodus pictus?
Granted it is not all that uncommon to see a 4-Line or other similar catfish mistakenly sold as a Pictus so it isn't entirely impossible. But if it is a true Pictus then it shouldn't get bigger then 6" (4-5" seems to be normal).