Disease Type: Bacterial (gram negative organism)
Organism: Aeromonas, Pseudomonas fluorescens, or Vibrio
- Fin edges turn white
- Fins fray
- Bases of fins inflamed
- Entire fin may rot away
- Correct root cause
- Water change
- Treat with antibiotics
- Addition of aquarium salt
The disease occurs when the fish become stressed by something in the environment. The most common causes of Fin Rot are poor water quality and improperly low water temperature. Overcrowding the tank, feeding outdated food or overfeeding, and moving or handling the fish can also cause stress leading to Fin Rot.
Treatment should include a water change, and careful examination of the aquarium conditions. If there is food debris, vacuum the gravel and take care to avoid overfeeding in the future. Start dating your fish food, as it loses the vitamin content fairly quickly after it is opened. Feeding fish fresh, high quality food, in smaller quantities is far better than frequent large feedings of stale foods.
If the root cause is corrected, antibiotics will usually cure the disease itself. Use a drug that is effective against gram negative organisms. Chloramphenicol, Oxytetracycline, and Tetracycline, are good choices. Always treat according to manufacturer’s instructions, as the preparations can vary from manufacturer to manufacturer.
The use of aquarium salt will benefit livebearing fish, but should be avoided in fish, such as scaleless catfish, that are sensitive to salt.
- Maintain good water quality
- Keep proper water parameters
- Feed fresh food in small amounts