[Ponds-Koi] Koi fin
I thought someone answered it. Without seeing it or good photos, best guess would be the beginning stage of fin rot due to bacterial issues. Is it only one fish?
You could do the salt dip or betadine treatment.
From… http://www.vet.uga.edu/vpp/Undergrad/Siegel/
Treatment
Treatment of bacterial skin disease depends upon the species of bacteria involved and the severity of the disease process. Antibiotics, 8% salt dip, and cleansing wounds with 7.5% betadine solution (an organic iodine preparation) have been used to successfully treat skin ulcers and erosions in fish. Selection of antibiotics should always be made with knowledge of the culture and sensitivity data. Some bacterial infections, particularly those caused by Gram-negative bacilli, may be rapidly fatal despite attempted treatment. Conversely, skin disease secondary to chronic mycobacteriosis may be slowly progressive but not very amenable to treatment.
Good water quality, good diet, and lack of crowding also are important in treating diseased fish. Frequent water changes (with the addition of 0.3% NaCl to water), a clean filtration system, and proper maintenance insure that water conditions are optimal and help to eliminate unwanted waste products and organic detritus. Attention to water quality has proven to be one of the most effective actions to slow or eliminate the progression of bacterial infection. Good nutrition also is important to promote the immune system and tissue healing. Lastly, individual fish with skin lesions should be isolated in a hospital tank during treatment to prevent the infection of other clinically healthy fish. If many fish are infected, the population may have to be distributed among several designated tanks to reduce crowding and promote optimal response to treatment.
Category: Philippines Internet Koi Society
