what drgn Said.. also try and get it eating asap. live ghost shrimp, live blackworms, live red worms, or Nightcrawlers. frozen bloodworms, frozen mysis shrimp, or frozen plankton. Try the frozen foods thoroughly thawed before feeding first. If those don't work in the first 14 days go with live. You can also try worm pellets, but these can be hard to find and may or may-not work. Get it eating well, imo 1 month of solid eating and good weight/activity before trying newer foods. They can and will wither away from starvation fairly easy. Once well acclimated they are hearty fish, but getting them over the initial hump is key. Also try hand-feeding it, it will make introducing new foods later on MUCH easier. They lack much for teeth, But can deliver a decent pinch.
And Welcome to MFK.