That's a pretty cute catfish.
when we got him he was about 2 weeks old, under an inch and were feeding him blood worms, now he is about 2.5 months old and around 7". We feed a very nutrient rich DIY beef heart food that i make, it contains beef heart, chiclid pellets, tropical flakes, peas, carrots and cucumber. right now we are feeding him about three 1/2" cubes in the morning and two 1/2" cubes at night. im keeping an eye out for a 240+ ( ideally a 300 gallon ) tank to move him to when he gets older...