make sure hes eating well feed him daily add some garlic extreme or a product simular to his food before feeding I also add selcon to my fish food when thawing (vit suppliment) whatch for new spots could be ich or just air bubbles trapped on the slime coat.proper foods and nutrition can help fight off any illness .be sure to feed him a wide variety in his diet of meaty foods to ensure he gets all nutritional requirements if this is a start of ich good diet ,less stress can help eliminate it without medication if caught on time.keep us posted of any changes and good luck