The answer to both questions is no. It treats fungal infections that are due to external parasites. These are usually secondary type infections. Fin rot does not fall into this category. The betta is a very misunderstood fish. Because he is aggressive towards his own kind and cannot be kept in pairs or groups, stores separate them out into small bowls. While bettas are hardy and can handle such an environment in the short term; long term they need a tank of 2-5 gallons that is heated and filtered. Ideal water temperature is between 76 and 84 degrees Fahrenheit. They prefer slow moving water, so a very small filter is all that is needed to help keep the water cleaner, and to allow for treatments at times like the one you are currently experiencing. Medications cannot be placed in bowls because there is no water movement in most cases, and therefore, not enough oxygen to support both the chemical process and the fish.
Fin rot is most often due to poor water conditions, low pH, and so forth. Improving these conditions will go a long way towards healing your fish.
Date published: 2016-11-04