He looks a lot better in the latest picture. He still has a small patch on the side of his body but that should clear up soon.
You can continue treatment for up to 2 weeks but no longer.
If you can't find live food, try raw or cooked prawn/ shrimp. defrost one, remove the head, shell and gut (thin black tube in body) and throw these bits away. Use a pr of scissors to cut the remaining prawn up into little bits and offer 1 or 2 pieces at a time. Feed until the fish are full and then remove uneaten food straight away.