My neighbor is asking for help with her goldfish and I’m not much of an expert on these. Was hoping someone may have some additional insight. Fish is lethargic the past week, has loss of appetite, and there is a small red/white growth underneath the eye. I don’t have any parameters to give on the water unfortunately. I know she uses some freshwater salt and she’s had the fish for a few years without any additions. She did tell me she switched to gel food more recently but we’ll before symptoms showed.
Any help would be appreciated on the little information I have.
I can’t seem to post a picture here