Possible fin rot?

[Reefpuck]

Noticed this yesterday on the bottom part of the fin, on my melanurus wrasse. Any help/input appreciated.

<a data-flickr-embed="true" href="https://www.flickr.com/photos/137488726@N02/38418394386/in/dateposted-public/" title="20171116_133412"><img src="https://farm5.staticflickr.com/4550/38418394386_ddc40848fd_k.jpg" width="2048" height="1536" alt="20171116_133412"></a>******** async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

<a data-flickr-embed="true" href="https://www.flickr.com/photos/137488726@N02/38442642152/in/dateposted-public/" title="20171116_133400"><img src="https://farm5.staticflickr.com/4518/38442642152_c5ead7fd45_k.jpg" width="2048" height="1536" alt="20171116_133400"></a>******** async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

 

[Jdub968]

Possibly some rot gong on there you can treat with Kanaplex or furon2 in a qt. personally I would dose stress gaurd to the tank it has an anticeptic in it and observe if it worsens go with option 1

 

[Reefpuck]

Thank you, I will try stress guard today and see if that helps.