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Koi fish disease – Trauma Injuries

While it may seem that your Koi fish won’t have many opportunities to receive traumas swimming in the pond in your backyard, the occasion might arise where they encounter a few scrapes and bumps. Most of the time, these are not serious and will heal relatively quickly with a little care unlike some other Koi fish disease.

It’s common to see some relatively minor injuries during the breeding season. Actively breeding Koi fish tend to lose some scales. The females may lose some patches of scales or have a split fin here and there. While this may not strictly be a Koi fish disease, any trauma can lead to more serious problems. The best treatment is to put the fish in a separate tank away from the other fish for a couple of weeks and everything should heal very nicely.

A common trauma that occurs is the result of dragging against the bottom or sides of the pond. This is most often seen in the fins. Butterfly Koi have very delicate fins which are susceptible to dragging damage. If you have very young Koi fish, you might see this type of trauma in them as well.

The treatment for dragging trauma is a salt solution in the pond. Use a .3% salt solution – three pounds per 100 gallons of water in your tank.  This should help the fins heal. But be on the lookout for fin rot. Fungus can take a hold on damaged fins or skin. Watch the fish while the fin heals. Fin rot usually occurs during the warmer summer months. It is actually caused by the combination of warm pond water and high ammonia and pH levels. This is another reason why careful water treatment is so critical to the health of your Koi fish. The first signs of fin rot will probably be reddening of the fins.  This is followed by white patches on the ends of the fins as a result of the circulation that has been destroyed. Finally there will be erosion of the fins themselves.

Another injury that often times seems to be trauma linked is Kinked Spine. It can also be the result of poor diet. Unfortunately, many times the damage to the spine is the result of exposure to insecticides. Unfortunately the damage is permanent and euthanasia is the best answer.

Another cause of trauma can be electrocution.  Now most people would say this is highly unlikely and usually it is. But when lighting and other electrical devices are use around the pond there is always the possibility o electrocution. The electrical shock cause permanent nerve and muscle damage. Because the muscle control is gone, the fish swim in a very jerky manor. They will start to lose weight because they can’t compete for food. Because of the weakened state, other Koi fish disease is much more likely to develop.

While you may not think these trauma injuries are likely to occur, take special care to insure your fish are protected. You never know what might happen, but preventive care is the best defense. Even the smallest injury, if not treated can lead to much more serious Koi fish disease.