That's very unusual for the cichlids to be after the syno like that. Do you have any hiding places for him in the main tank?
You want to make sure he doesn't have a bacterial infection from the wounds. Are the white areas cottony or fuzzy in appearance?
I would use Melafix rather than salt. He sounds like he's in pretty bad shape. Should he worsen, or should the areas appear cottony, you may need to switch to antibiotics.
Daily water changes will help, as well.
I would find him a new home, too...
You want to make sure he doesn't have a bacterial infection from the wounds. Are the white areas cottony or fuzzy in appearance?
I would use Melafix rather than salt. He sounds like he's in pretty bad shape. Should he worsen, or should the areas appear cottony, you may need to switch to antibiotics.
Daily water changes will help, as well.
I would find him a new home, too...