this is a juvi cichla temensis about 7 inches long, he is missing a pectoral fin and has been sporting a wound in his gill cover for quite some time now. the wound is about 4 months old now and it never heals. i tried adding salt into my tankwater but the wound still persists. Aside from the wound my fish is very healthy and is adjusted to its deformity (missing one pectoral fin) im just kinda concerned with his wound because its stil not healing, any advice guys?