I've never seen the spotted hampalas for sale here. Lucky you.
Mine eats anything. It was nearly starved to death at the wholesalers tanks, so once I bought it home from the store, it began eating live blackworms and took pellets the next day.
I had a school of 10 of these hampala barbs last year, size range from 4-6" and they were absolutely awesome. Wish I had the space to keep them all.