Silver Arowana

Silver Arowana is named for its resemblance to ancient dragons and its silver scales. The color of young Silver Arowana is bluish, and it looks very beautiful when swimming in water with reflected light. Adult Silver Arowana can grow up to 90-100 centimeters and is a large ornamental fish.

The Silver Arowana is mainly found in the Amazon River Basin in Brazil. It was first discovered by the ichthyologist Vandelli in 1929. It is a type of edible fish in the local area. It was introduced to the United States in 1935 and to Japan in 1955. In 1966, Mr. Gongtian from Kobe, Japan, first successfully artificially bred them at a tropical breeding farm in Asu Chongyang, Kyushu, using hot springs. However, what is seen in the Chinese market is still mostly imported from South America through the United States, with very few being artificially bred. The scales of the fish are large and semi-circular, appearing pink in color. The body of the fish is metallic silver, with a mixture of cobalt blue, blue, and green colors, shining brightly. The dorsal and anal fins grow backward, with long bases, short tail fins, and large pectoral fins.

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Blindness

Blindness is generally caused by water quality. The most obvious symptom is the white opacity or turbidity on the surface of the silver arowana's eyeball. Treatment method: change one-third or one-half of the water, pay attention to maintaining the water temperature. Generally, the condition will improve after a few days.

Erythema

Erythema is a common disease of silver arowana, also known as printing disease. It is a viral disease. Treatment method: maintain the water temperature at around 33-36 degrees Celsius and add blacknamin to the water.

Louse Disease

Louse disease is also a common disease of silver arowana, which is actually a parasite. Treatment method: if there are only a small number of lice, they can be removed directly by hand and apply antibiotic ointment; if there are too many lice, soak the diseased fish in a solution of one in 80,000 potassium permanganate for one hour, once a day for a total of three times.

Fin Knotting

Fin knotting is generally caused by water quality problems or poor appetite. Therefore, to improve this symptom, the breeder can change the water to improve water quality and promote feeding.

Eye Loss

Eye loss is caused by incorrect feeding methods. Treatment method: cover the fish tank with opaque black paper, add a white light to the top of the fish tank, feed food at the top or place an object at the top of the fish tank to attract the attention of the silver arowana, remove the black paper after 3 months.

Self-Cutting Syndrome

Self-cutting syndrome refers to the phenomenon that the dorsal fin, caudal fin, and anal fin of young silver arowana break or fall off near the bottom of the body after being startled. The broken fin will grow back by itself. To prevent secondary infection, a certain amount of methylene blue can be added.

Anchor Worm Disease

Anchor worm disease is also a parasitic disease. The breeder can find parasites about 1 cm in length, with their heads hooked inside the fish body on the diseased fish. In the early stage, silver arowana will have poor appetite, and the parasitic position will be swollen and bleeding. In severe cases, it can lead to tissue necrosis. Treatment method: soak the fish body in a solution of 5-10 ppm potassium permanganate once a day.

1. The Silver Arowana is suitable for living in weakly acidic water, and the water pH should be maintained between 6.5 and 7.5.

2. The nitrite and chlorine content should be zero, and a good nitrification system should be established to maintain water quality.

3. At the beginning of tank setup, the water should be settled. It is also recommended to settle the water with each water change thereafter.

4. The water temperature should ideally be maintained between 25 and 28 degrees Celsius.

5. The Arowana is a very sensitive fish, and any small changes in the external environment or the water in the tank can be detected by the Arowana. If these changes occur suddenly, the Arowana will consider them abnormal and may get easily scared. It is important to ensure stable water temperature and avoid sudden and drastic changes. This is also an important aspect of how to raise a Silver Arowana.

Regardless of the growth stage of the Silver Arowana, it is important to ensure the cleanliness of the food and to promptly clean up any leftover food to avoid water contamination and the occurrence of diseases in the Silver Arowana.