Is there something wrong with my Blue tang? HELP!

[KristinaY]

Hi guys,
Need a bit of help..

For the past week my blue tang has been looking stressed, her fins all out and flared constantly. Today as I went to feed the fish I noticed the front of her back fin looks like it’s disintegrating somehow… it just doesn’t seem right. It’s possible that it’s always been like this and I am only just noticing but wondered if this was a sign of anything? Is she getting sick? It doesn’t look like she’s been bitten to me but could that be a possibility? It just seems unusual.

Any advice or experience welcome please, she’s one of my favourites and really don’t want anything happening to her.

 

[vetteguy53081]

Appears to be very thin and has both fin rot and lymphocystis which both associated with poor water quality.
What are your test readings and age of tank ?

 

[ChaosAquaculture]

parameters? -- kali