by Ponds Guide | Feb 21, 2021 | Koi Diseases
If you look at the fish from above, does it look like a pine cone (scales are open)? Or is just his stomach a bit thicker? In the latter case, it can also just be a female that comes into laying. Dropsy can be due to a virus or bacteria, and then they are contagious,... 
by Ponds Guide | Feb 21, 2021 | Koi Diseases
Some bacteria, especially Aeromonas and Pseudomonas, cause fin rot, skin disorders, and internal bleeding. These bacteria are common in freshwater and can cause diseases even at a temperature of 10 ° C, with the result that they can be a problem, especially in spring... 
by Ponds Guide | Feb 21, 2021 | Koi Diseases
Koi Mold is a bacterial infectious disease that usually manifests itself when koi are kept in poor living conditions or when the fish become stressed due to a sudden deterioration in water quality. In this disease, whitish, mossy patches form that first appear around... 
by Ponds Guide | Feb 21, 2021 | Koi Diseases
Fungal disease can be caused in a pond by a number of fungi that occur naturally in most waters, for example, the fungus saprolegnia. These fungi are no problem for the healthy koi in a well-maintained pond. In fact, they help maintain a balanced ecosystem because... 
by Ponds Guide | Feb 21, 2021 | Koi Diseases
Carp Pox is the most common virus in the koi world. It is also called temperature stress because this virus can only give a skin reaction when the temperature changes. It is also one of the oldest common signs of disease in carp (for over 400 years). This picture is... 