Haha..
I think the topic is still relevant as long as there is a new arowana keeper.
I am also starting to train my arowana on pellet. Currently the diet is mostly crickets and MW. Occasionally frog and dubia. He does not like MP. Once I was out station for 4-5 days, when I feed him MP he can take it. but after mixing up with MW and cricket again, he doest take MP.. not his favourite I guess.
Now I am going to start training/ starving him so that I can feed him pellet. It is in a comm tank, with 2 5' IT, 8' flagtail, 3 myleus lamax, 2 clown loach, 2 polka dot loach 1 upside down catfish and one pleco. Hopefully i can also train my IT to accept pellet.