Arowana requires a slightly acidic to neutral water environment, with soft water hardness. The pH should be between 6.5 and 7.5, and the general hardness (DH) should range from 3 to 12. The ideal water temperature is 24–28°C. Nitrite and chlorine levels must be kept at zero to ensure a safe environment for the fish.

When introducing new Arowanas to the tank, it's crucial to run the air pump for at least 24 hours to remove any chlorine from the water. If you have a biofilter, allow the water to stabilize at a pH of 6–7 and a temperature of 25°C. Adding a small amount of salt—about 1 or 2 teaspoons per 5 gallons (20 liters) of water—can help prevent fungal infections and boost the fish’s health and appetite. If possible, transfer some water from the original tank where the Arowana was kept to your own tank. This helps the fish adjust more easily to its new environment. It's best to transfer about one-third of the original water. Starting to raise Arowanas from a young age is highly recommended for better long-term results.

Daily care involves changing 20–30% of the water weekly. Ammonia levels should not exceed 0.1 ppm. Avoid sudden changes in temperature or pH, as these can lead to stress and even death. Regularly test the pH and other toxins to maintain good water quality. When changing water, avoid overdoing it—completely replacing the water can harm the fish. If you notice fin or scale loss, it may be due to excessive water changes; stop changing water temporarily, and the fish should recover naturally. However, too little water change can cause cloudy eyes and poor fin appearance, so balance is key.

The aquarium should be at least 1.5 meters long, 0.5 meters wide, and 0.7 meters high. It must be covered, as Arowanas are known to jump out of tanks. They prefer to swim near the surface and can suffocate if they don’t get enough oxygen. Lighting is important: Red Arowanas need around 4 hours of daylight, while others benefit from up to 8 hours. Some hobbyists use red light to enhance coloration in Red Arowanas, but natural daylight is always the best choice. Prolonged exposure to artificial lights can dull their colors over time.

Filtration is critical for Arowanas, especially as they grow large. Suitable filtration systems include top filters, external filters, sand filters, and overflow filters. A lift pump or surge pump is also beneficial, as it creates strong water flow, increases oxygen levels, and encourages exercise, helping the fish maintain a sleek body shape. It also prevents Arowanas from flipping upside down, which can be harmful. Using a pump during recovery periods can aid in proper fin development.

Feeding Arowanas properly is essential. They tend to hit the sides of the tank when eating hard food, so feeding in the center of the tank is advisable. Arowanas are carnivorous and thrive on foods like frogs, loaches, crickets, goldfish, grasshoppers, shrimp, and more. For color enhancement, feeding red-colored foods such as red worms or shrimp can improve the vibrancy of Red Arowanas. Juveniles under 12 cm should start with soft foods like live brine shrimp, peeled shrimp balls, and bloodworms. Feed them four times a day in small portions.

Once Arowanas reach about 15 cm, they can eat larger prey like breadworms, shrimp (without the tail), and small fish. Their growth rate is rapid, so feeding frequency and quantity should be adjusted accordingly. Fish over 20 cm can handle larger prey such as whole fish, shrimp, and meaty baits. Live insects are also preferred, but care must be taken to avoid contamination.

It’s important to avoid feeding Arowanas fatty foods, especially liver, as this can lead to health issues. Goldfish, often used as live bait, can carry diseases that affect Arowanas, particularly in smaller tanks. Artificial diets made from lean beef are a good alternative, though Arowanas may need time to adapt. Specialized Arowana food is available, but they might initially refuse it.

Stocking density depends on the size of the fish. For example, a 5-gallon tank can hold up to 30 Arowanas if each is around 20 cm. Larger tanks allow for more fish, but overcrowding should be avoided to maintain water quality and reduce stress. Always keep the environment as clean and stable as possible for the health and well-being of your Arowanas.

Hematology Analyzer

Hematology analyzer is also called clinical blood cell analyzer, blood cell analyzer, blood cell analyzer, blood cell counter. The blood analyzer not only improves the accuracy of the experimental results, but also provides many experimental indicators, which play an important role in the diagnosis and differential diagnosis of diseases. Hematology analyzer is one of the most widely used instruments in hospital clinical testing.
Test items
Blood cell test refers to routine blood test, which is manual operation and counting under the microscope at first. It includes red blood cell, hemoglobin, white blood cell count and its classification, platelet count, etc. There are more than 20 items.
clinical significance
1. The blood analyzer is mainly used to detect various blood cell counts, white blood cell classification and hemoglobin content.
2. Hematocrit: obtained by multiplying the average volume of red blood cells by the red blood cell count.
3. Red blood cell distribution width: represents the degree of consistency of red blood cell size. When the red blood cell size is uneven, the red blood cell distribution width value increases, such as various types of nutritional deficiency anemia.
4. The three average indices of red blood cells are used to identify the type of anemia.
(1) The average hemoglobin content of red blood cells: increased in megaloblastic anemia, decreased in iron deficiency anemia, chronic blood loss anemia, uremia, chronic inflammation.
(2) Mean volume of red blood cells: increase in hemolytic anemia and megaloblastic anemia; decrease in severe iron deficiency anemia and hereditary spherocytosis.
(3) The average red blood cell hemoglobin concentration: decrease in chronic blood loss anemia, iron deficiency anemia; various diseases can be in the normal range. In megaloblastic anemia, the mean red blood cell volume increases, the mean red blood cell hemoglobin amount increases, the mean red blood cell hemoglobin concentration is normal, and the red blood cell distribution width increases.
5. Average platelet volume: the average volume of each platelet, the size of platelets is related to its function.
(1) Increased: seen in patients with idiopathic thrombocytopenic purpura, edema and proteinuria in late pregnancy.
(2) Decreased: seen in non-immune platelet destruction, aplastic anemia, thrombocytopenia repeated infection syndrome, chronic myeloid leukemia, etc.

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