I used to feed mine every other day took along time to get off live foods loved rosies! and hikaria carnivor sinking pellets!
The #1 killer of small tigirinus is water quality they are very sensitive to it, need very clean water! Try to get him feeding right away! I find if I get a catfish to eat then i can keep him alive1 had a tigrinus for a year then i had to move for work, lost him in the move! I love them and will get one hopefully this year but the price's range from $4-6 hundred dollars for a small one and that is a little high for such a sensitive fish at small sizes i deff miss mine! the center peice of any catfish collector!