hunger strike

Hey guys fairly new to this forum but just wanted some help on my cross back I got about a month ago he is 10 years old and I have had him for about a month now. He has only eaten a earth worm and a couple crickets in the time I have had, is there anything I can do to entice him to eat?. He does not seem interested in anything I try Its driving me nuts lol

:Water ppm are ammonia 0 nitrite 0 nitrate 10 pH 6.5
My XB goes on hunger strikes all the time. Longest one was nearly a year. A large arowana can go a very long time without eating. Once he settles he'll eat.