Got a sixline wrasse about 3 and half weeks ago. It spent 2 weeks in qt with no probs. It's been in dt now for 11 days with no probs although I noticed today that just where it's fin meets it's body it has a swelling. I saw it this morning but was not sure if I was imagining it. However this evening it has got worse. Stats are all good although I have been raising KH
the last few days as it dipped to 6dkh. It's now 9. I have only raised 1 dkh
per day so this should not stress the fish. The pics make it look slightly worse than it is. To the naked eye you do have to look twice to realise there is a problem. If I compare it to the other side where there is a normal slight bump where the fin meets the body it probably twice as big. It is eating well, normal behaviour, and its movement is normal. No flicking or rubbing. Any of you experts got any ideas?!