I had one that wouldn't eat for a least a week to 2 weeks. I was sooo worried about him. Eventually he ate. I used a turkey baster with (melted )frozen bloodworms for some time so he was used to eating and got stonger. He was very shy. After a while, he ate everything,
pellets, flakes, bloodworms, and pretty much anything I put in the tank. I think you just need to give him some time. *celebrate
Good luck to ya!!!!
Jeanna