Why the fin rot disease attacks the fish in our aquarium? Certain conditions that favor the appearance of the disease should be present at the same time: An alteration in the environment that makes pathogenic the microorganisms that are normally in the aquarium. An imbalance in the immunologic system of the fish.
The alterations in the environment can be caused by: poor quality water, low water temperature, excess of organic matter, pH excessively acidic or excessively alkaline. These conditions can cause the bacteria to become pathogenic.
The balance of the immunologic system of the fish can be altered by: overpopulation, coexistence of incompatible species in the tank, lack of oxygen, wounds which are not well cured. These conditions can cause stress to the fish, therefore they lower its natural defenses.
When in the community tank there is an excess of harmful bacteria and fish with low defenses, our fish get sick. As a result of the bacterial attack, it is very probable that the fin rot disease takes place. The first manifestation of the disease is the presence of a whitish edge on the fins.
The first fin to be affected is usually the caudal fin. As the disease progresses the fins are dissolved. The cartilaginous rays are also affected. The fin can be reduced to a stump. The consequences of the disease can be irreversible. Being a disease caused by bacteria, the treatments are based on antibiotics. Have the caution of using antibiotics that don’t affect the beneficial bacteria of the aquarium.