Pellet training doesn't always mean starving is involved. Never too early either. As mentioned, just serve pellet first followed by other suggested food that it'll eat"
I agree pellet training does not necessarily involve starvation. My concern is the Aro has gone off food rather than the type of food being the issue. In all my years of experience with Aros, young fish are usually very eager with most food but pellets don't come naturally usually. Hopefully the thread starter's fish starts eating soon and success with pellet training
My fish is doing wellAs said, dont apply meds if your not sure if there's anything wrong. Your tank parameters are good so keep it up.
I've never owned an Asian Aro, but I can't imagine a 6" turning away bloodworms, so give that a shot. In the long term, I think pellets are best as a staple. When training, I always start with a few pellets to start. Then follow by something I know they like such as bloodworms, mealworms and/or small crickets.
Be patient and eventually it should take the pellets and not spit out.