Here is what I do, some might not agree, but it works for me...
Go get about 5 dozen Fathead minnows from your local bait and tackle store. Feed those to him the first two weeks to get him nice and fattened up and used to your tank. From there you can transfer him over to prepared foods or continue feeding live. Fathead Minnows are 75 cents a dozen at my local bait store... Hope this helps...
cheers guys gonna give it another day and try river shrimp to see if he eats at the moment theres a small fish in there with him but he is not intrested