- Reaction score
- 5 to 10 years
Nearly 4 months ago I had ONE fish out of 25 that got a spot like this. A week later, it was gone. Now 4 months later I've got ONE fish that has one spot like this on his tail fin. Within a few days the spot is now nearly gone.
I looked up the columnaris description on the site and also looked at photos. I don't believe it's that because it's just one spot and has gone away - also nearly 4 months in between it happening again.
Any suggestions what this could be? Do I need to worry about it since it seems to go away on its own and no other fish have gotten it? I do bi-weekly water changes and all of my water readings are good with the exception of the ph raising up and down between 7 and 7.4 between water changes.
Thanks for your help -