Koi Fish

History of Koi

-Koi are as you may already know, are descendants of carp. The word "Koi" was first used about 2,500 years ago in China. Koi fish have been used in Chinese artwork and carvings and some Chinese rulers kept carp in captivity for their viewing pleasure. Breeding of carp for color patches did start in China. The Japanese rice farmers did use them for food and began to breed some for beauty. Much of the credit goes to the Japanese as the creators of Nishikigoi, or as we call them, Koi or Living Jewels.

=Symptoms of Illness

-Whenever moving a fish to a quarantine tank, be sure the water quality and temperature are the same or very close. This is a time that the fish needs no additional stresses. An 8 degree difference in water temp. can be just the thing to push the fish over the edge.

Flashing and or scratching the pond sides:
Consider visiting Dr. Johnson's web site - www.KoiVet.com
-Usually an indication of a recent change in the water. If some water was replaced or added. Consider checking the chemicals and adjust as needed. If this continues, then consider the possibility of flukes. If jumping, then test water and adjust if needed and watch fish more. If jumping continues, then Flukes is more likely. Visit www.KoiVet.com for more detailed Koi illness, symptoms and remedies.

One fish looses its appetite.

-If all the other fish are feeding fine with exception to one, usually this happens when a fish is ill and is progressively getting worse. Consider getting a Quarantine tank ready if you feel the fish is needing treatment.

Fish is nose down and tail up.
-Clearly an indication that the fish is stressed and not doing well. Add Salt right away or quarantine and add salt. Consider getting the salt level to 0.3% during a 24 hour time frame. Adding 1 lb. per 100 gallons will increase the salt level to 0.1%. 12 hours later, add another 1%, then repeat again in 12 hours. This should bring you to 0.3%.

Determining Gender
Male Fish
-Male Koi tend to be more slender then females. Males do most of the chasing during breeding season. Males also have a rougher skin under the lower jaw after 2 years of age. Similar to a male humans face after a day of not shaving.

Female Fish
Shape is more round along sides. Females are often the ones being chased during breeding season. No need to be alarmed if you witness males pushing the female around. One or more males are attempting at forcing her eggs out so that they may fertilize them.


Reduce the bacterial count that threaten your Koi.

KoiZyme is a biological formula of naturally occurring bacteria, enzymes and micro nutrients.
When used as directed, KoiZyme will reduce the bacterial count of Aeromonas, Pseudomonas and other pathnogenetic bacteria to such low levels that they will not be a threat to the health of your Koi.

The natural way to reduce pathogens is to "competitively exclude" them from the vital elements they require to survive, grow and multiply.

Click here for KoiZyme products

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