Hello everybody!
This is my first time posting on this forum so hello to everyone 🙂 I have kept fish for about 10 years now and I'm still learning new stuff every day! I rarely have to deal with illness from my fish so I need some help identifying what's wrong. I just got this new 20 long about a month ago from a craigslist post and all the fish are surviving. (Yay!) I noticed this white line on this Apistogramma Opal after about 4 weeks. I was wondering if anyone knew what this is. It doesn't look like Ich to me and no other fish show any illness. Sorry for the poor camera quality, but the location is roughly behind the gills/center of the fish. I can post my water quality and hardness after I test them if that helps anyone. Thanks!