Spotted pictus catfish are best feed on sinking catfish pellets. But they will eat almost anything you offer them, including other fish, frozen bloodworms, traditional tropical fish flakes, and pellets.
Spotted pictus catfish love algae and as a result they can be found clinging to the the side of the aquarium or on rocks eating the algae off of them. They love to eat the leftover food from the other fish. The best thing to find them is feed them a slice of cucumber.