Even though how resilient your Koi collection is, there will be times when they will also get sick, especially if you fail to give them the right kind of care, nutrition and maintenance they need to grow and survive. One of the most common fish diseases that they can acquire is bacterial infection. This occurs when one or two of your Koi suffer from stress, scratch, injury, split fin or lost scale. Other causes include poor water quality, overstocking of pond and overfeeding of fish.
Once your fish gets stressed or wounded, the naturally occurring bacteria dwelling in your pond will have the chance to get in to the skin integrity of Koi and caused serious problems there. These bacteria include the Aeromonas and the Pseudomonas bacteria, which are found mainly in the water of ponds and lakes. These bacteria move very quick and spread rapidly. As soon as the dermis layer of the fish is exposed to bacteria, these harmful bacteria will begin to attach themselves onto the surface of the fish.
If at least one of your Koi is affected, the simplest way to get rid of bacterial infection is by drying off the wound using a paper towel. Gently soak the sore in a solution of hydrogen peroxide using a cotton swab for about 30 seconds before returning it to the water. As much as possible, you must quarantine the affected fish to avoid the spread of the infection. This way you can monitor the condition of your fish without causing any harm to the others. You must repeat this procedure for three consecutive days.
For larger wounds, on the other hand, you can also do this procedure only this time you will have to apply a Debride Medicated Treatment to dry off the sore. Do this for about three days. If none of these treatments work, then it is highly recommended to call a specialist in fish care. You will also have to feed your fish with medicated food for faster healing process. Never attempt to double the dosage when treating severe infections. Consult a licensed veterinarian to help you with the proper medical treatment.