My fellow reefers, first time post here. Couldn't find any topics on this so I thought I'd reach out for some help. I have a blue hippo in qt who came down with ich after new tank mate was added and things got a little heated. Fish has been in qt for almost 3 weeks now. All symptoms of ich are gone. But there is one spot on pectoral fin that won't go away. I tried fw dip. Tried removing the spot by hand. Wont go away. My question is should I leave in qt longer? Is there cases of permanent single white spot on a fish. Doesn't seem like and ich from my experience I could be wrong. I want to also add it looks like it has gotten smaller in size but still there. Other than that the fish is healthy eating great no spots besides this. Any body experience this? Thanks