Nice NTT.
How many did you get?
I'd try and get them on shrimp or bloodworms. It seems shrimp is easy to get them on after they have been on live, cheaper too. Depending on your stock, a pound of shrimp can last a little dat like that 2-3 months.
try frozen krills...it works, I recent bought two NTT one at 4.5" and 5.5" which has been fed on live foods since they were a baby with the previous owner. What I did is starved them for exactly a week since I first introduce them to the tank with bunch of Indo Datnoids and now both of them eat frozen krills and frozen bloodworms. Good luck with yours Ntt, btw nice looking Ntt dat you got there in the pic.