golfish sick black spot parasite

She had an ulcer on her face that healed (mostly) with coppersafe. Several weeks ago , these black spots appeared on her face around the ulcer. There's a possibility the spots may be the parasite that comes from snails. Any way to tell for sure?

She had an ulcer on her face that healed (mostly) with coppersafe. Several weeks ago , these black spots appeared on her face around the ulcer. There's a possibility the spots may be the parasite that comes from snails. Any way to tell for sure?

She had an ulcer on her face that healed (mostly) with coppersafe. Several weeks ago , these black spots appeared on her face around the ulcer. There's a possibility the spots may be the parasite that comes from snails. Any way to tell for sure?