How to diagnose Fin Rot
Just because your Betta’s fins are deteriorating does not necessarily mean that your fish automatically has fin rot, although it is the most likely culprit. In order to accurately diagnose the problem, you will need to test the water for ammonia. Even small amounts of ammonia in the water can stress your betta out enough to cause a bacterial infection to grow. You can purchase a pH kit at your local pet store.
Once Fin Rot is diagnosed, what to do next
If you caught the onset of Fin Rot quickly, it could be as easy a fix as simply changing out the water and gravel. A lot of times that is all that is necessary. However, if your betta is in a more advanced stage of fin rot, then there is a process that you will need to go through.
Here are the steps:
- Replace your fish tank with fresh water
- Clean any items that you may have in your aquarium..replace gravel if you have it.
- Apply some form of fungus eliminator to the water.
- Add some aquarium salt to make the environment not so “bacteria friendly”.
That is essentially all there is to treat and prevent fin rot.


