All About Koi Health

Koi health is very important if you want to enjoy your fish for a long time. Koi fish are known to live for decades even though the usual life span is 20 to 30 years. Koi are hardy and tough; however, they can get sick. Their longevity depends mainly on genetics and living conditions.

The modern day koi are tough but they have lost much of the toughness of their ancestor, the magoi carp. They can thrive in the poorest water conditions and remain unaffected by the presence of parasites. This is because of the inbreeding practice that started from way back when nishikigoi was first being developed. Breeders needed to pair koi with parents and siblings to obtain the perfect body shape, intense colors and beautiful patterns that make the present koi so admirable.

Nevertheless, the koi of today rarely get sick and if they get sick or perish, you can trace the root cause to water quality problems. Similar threats to koi health are parasites, ulcer disease, predators, medicine overdose, leaping out of the water, virus infections, toxic pesticides, and tumor.

Water Quality

Poor water quality is the main cause of koi death. You will have to watch out for the pH, ammonia, nitrite, nitrate as well as oxygen levels in your pond. Even marginal alterations in their levels can negatively affect koi health. PH refers to the acid and alkaline content of your water. Koi need a pH of 7.0 through 9.0. Ammonia is produced by your koi in the form of waste. It can be removed properly by using biological filter system that makes use of the nitrification cycle.

Bacteria will convert ammonia into nitrites. However, nitrites are still toxic to the koi and must also be converted by other bacteria into nitrates that are comparably harmless to the koi. Nitrates, in turn, are absorbed by the plants and also algae in the pond. You already know how oxygen is needed to support life. As your koi grow in size, they will need more dissolved oxygen. To Make sure that there is plenty of oxygen in the pond water install a waterfall, jets or air pump, or put air stones to add oxygen to the water.

Parasites, Ulcer Disease and Bacterial Infections

If the koi fish die or exhibit abnormal behavior regardless of the good quality of your water, you could expect the reason to be either parasites or bacterial infections. Parasites such as anchor worms and fish lice can be harmful to your fish. The early signs are red or white pimples that quickly turn into sores. The ulcer can get into the muscles of the fish so you have to discover the disease during its early stages.

You will need to keep you koi free from parasites. Keep the affected fish in salted water and supply with medicated food. You can swab the sores using betadine to help them heal. Consult with a veterinarian on how best to treat your koi.

Quarantine

You will need to isolate any new fish for at least three weeks before adding them to the pond. During this period, you will have to treat the fish for parasites. If you lack a different quarantine tank, be sure to purchase your koi only from reliable dealers that guarantee their fish to be parasite-free. Also carefully choose the plants for addition to the pond which also needs to be parasite-free.

Overcrowding

If you keep on having koi health problems (like stunted growth or perhaps erratic behavior) even if your water is of top quality and you bought only parasite-free fish, you may want to evaluate your koi population. Your fish may be experiencing stress because of overcrowding.