I've tried frozen bloodworms but the cube to big for his mouth and if the foods not on the surface he won't eat it I had him on pellets but now it's like he hates them he keeps spitting them out
fast him for a few days and try to feed him again depending how long he's not been eating. The same thing happened on my flowerhorn a few days ago, spitted out flakes so i left him to starve for 4 days. Fed him after and boom eats like a vacuum.