CATDOLL : CATDOLL: Requirements for raising dragon fish

Requirements for raising dragon fish

1. Water quality: Arowanas need weakly acidic soft water. Generally, tap water from rivers is weakly acidic and is suitable for arowanas.

Golden Arowana fry

There are chlorine or fluorine in the water, which is harmful to the dragon fish and may even cause death. Therefore, when raising dragon fish, the water must be stored for 1 to 2 days or exposed to sunlight for half a day to allow the chlorine or fluorine dissolved in the water to disappear by itself. You can also add a very small amount of baking soda to the water to decompose the chlorine. If you use tap water, well water, or mineral water from underground, the hardness may be high. You should add one-third or one-half boiled water or distilled water to reduce the hardness of the water. The old water in the aquarium that has been used to raise dragon fish for a long time will generally become hard water due to evaporation and should be softened in time. The simplest way to soften water is to boil the water first to remove impurities, or filter it with ion exchange resin filtration equipment.

2. Water temperature: The water temperature should be kept at 24℃～26℃, especially for silver and black dragons, the water temperature needs to be raised to 28℃～30℃. Dragon fish are very sensitive to sudden increase or decrease in water temperature, which can easily cause nervous system shock, absorption interruption, and lead to death. When raising dragon fish, the water temperature must be strictly controlled. Especially for dragon fish raised in an aquarium, the temperature difference between the new and old water should not exceed 2℃ when changing water, and when the new water is injected, it must be poured and spread. When the dragon fish is transported to a new environment for breeding, it should be waited for about 15 minutes until the water temperature of the transport container is close to that of the new breeding environment before putting the fish in.

3. Oxygen: There are two main sources of dissolved oxygen in water. One is the product of photosynthesis of aquatic plants; the other is directly dissolved from the air. However, the decomposition of leftover bait, fish excrement and dead branches and leaves of aquatic plants in the water also continuously consumes the dissolved oxygen in the water. Therefore, various dirt in the breeding pool and aquarium should be cleaned up in time. In order to ensure that there is enough dissolved oxygen in the pool or aquarium, oxygenation equipment should also be equipped. In addition, the consumption of dissolved oxygen in water is closely related to the stocking density of dragon fish. The best density for dragon fish breeding is calculated based on a fish body length of 20 cm and a water depth of 50 cm. 15 dragon fish can be raised in 5 square meters of water surface, and 30 dragon fish can be raised in 15 square meters. As the water surface expands, the stocking density can be appropriately increased.

4. Light: Fish need moderate light during their growth, preferably sunlight can shine into the breeding water for 3 to 4 hours twice a day in the morning and evening. If the light is too dark, the dragon fish will move stiffly, have a poor appetite, and have a dull color; if the light is too strong, it will also swim abnormally and even develop bubble disease.

5. Aquarium management: Arowana is a large fish, so the length of the aquarium should be more than 120 cm. At the same time, ultraviolet sterilization should be installed to prevent diseases. Filters are definitely needed, as well as heating rods and light tubes. The aquarium must be equipped with an air pump, which can not only increase the dissolved oxygen in the water, but also remove the excessive concentration of carbon dioxide in the water. In order to prevent the arowana from jumping out of the water when frightened, the aquarium must also be covered. The water in the aquarium should be changed at least once every three days, and 1/4 to 1/3 of the water volume should be changed each time. If the fins fall off, it may be due to too much new water. Just stop changing the water immediately and it will slowly recover.

6. Feed: When eating, the dragon fish will hit a certain angle in the tank and get injured. It is best to feed it in the middle of the fish tank. Dragon fish are carnivorous animals. Most dragon fish eat frogs, loaches, crickets, goldfish, grasshoppers, shrimps, etc. There is a problem of coloring when feeding. For example, feeding red dragon fish with red arrows or shrimps will play a certain role in enhancing the color of red dragon fish, because red arrows and shrimps contain red pigment.

Golden Arowana

Young fish have just started to eat raw bait. At this time, you can feed them white mealworms that have just shed their shells, small shrimps (be sure to remove the head and tail, and it is best to peel them into shrimp balls to avoid the hard shells hurting their stomachs), bloodworms and other more palatable baits. Feed them small meals and feed them four times a day. Small dragon fish about 15 cm can be fed with normal mealworms and small shrimps (it is best to remove the shrimp swords of small shrimps), and can also be fed with 1.5 cm small fish. At this time, dragon fish grow rapidly and have an amazing appetite. You can appropriately increase the number of feedings and the amount of feeding. Dragon fish over 20 cm can be fed with larger fish, shrimps, loaches, meat pieces and other baits. You can also feed them various live baits such as insects, which are the favorite foods of dragon fish, but be careful not to let these baits be contaminated. In addition, internal organs, especially the liver, are not suitable for feeding dragon fish, as the high fat content in the liver will cause diseases in dragon fish. Goldfish is not a good live bait. Studies have shown that the infectious diseases or parasites that dragon fish, which feed exclusively on goldfish, contract in a small aquarium are almost all transmitted by goldfish. The best artificial bait is beef with less fat. Of course, if conditions permit, you can buy ready-made dragon fish bait. However, when feeding artificial feed at the beginning, dragon fish will be very uncomfortable and need to be trained by artificial feeding.

Sources:

Requirements for raising silver arowana

At the beginning of raising arowana, the basic length, width and height of the dragon tank are recommended to be at least 180cm long, 75cm wide and 60cm high. The water temperature should be controlled between 24 and 32 degrees C. This will provide a better growth environment for arowana. The most important thing in raising arowana is the management of water quality. If the water quality can be improved, a good balance can be achieved under artificial breeding. The following are some of my ideas on water quality management, which I would like to share with you: The accumulation of fish excrement will produce toxic ammonia, and nitrifying bacteria are mainly used to decompose ammonia that deteriorates water quality. After decomposition, it will become nitrite and nitrate~

Nitrifying bacteria should be cultivated in the water filtration system, not in the water. The placement of filter materials in the filtration system is also very important. Incorrect methods will result in half the result with twice the effort.

Take the upper filter system as an example. The ceramic ring and the biochemical ring should be placed at the bottom, and a layer of biochemical cotton should be placed on the top. This constitutes a simple nitrifying bacteria culture bed. The white cotton is generally used. Every time the filter material is replaced, the white cotton on the top is replaced. The biochemical cotton, ceramic ring, and biochemical ball should be washed about once every six months to keep the water flowing smoothly. However, the biochemical cotton, ceramic ring, and biochemical ball should not be washed together. Instead, they should be washed and put back into the water tank after a few days. After washing, they should be sterilized in the sun for three days before being put into the filter system. Remember that the nitrifying bacteria culture bed should not be cleaned or replaced frequently. If you are worried about insufficient nitrifying bacteria, you can purchase an external water filter. Do not put white cotton in it. Only put biochemical cotton, ceramic rings, and biochemical balls as a dedicated nitrifying bacteria culture bed. When changing or washing, do not change the filter material all at once, but change it in small parts. And after changing each one, it is more appropriate to wait three days before changing another one. Otherwise, the nitrifying bacteria will not be enough and the pH value will change too much, which is very dangerous.

If the water is not changed for a long time, the impact is mainly the following three points:

First, the concentration of nitrate and ammonia is prone to be too high, and the water quality is prone to deterioration.

Second, electrolytes are also prone to high

Third, once the water is changed, it is easy to cause backflow (water backflow) and the pH value drops sharply.

If you are raising water in a new aquarium, after adding nitrifying bacteria, it is recommended to increase aeration, throw a dead brocade on the filter tank, and add some aquatic plants and trace elements to the water, so that the saprophytic bacteria can have enough food to reproduce and promote the nitrifying bacteria to survive in the biochemical filter material.

In addition, for normal water quality management, basic observation methods can be used to make some preliminary judgments. The judgment methods are as follows:

Here I divide it into two ways to look at water and provide them to everyone:

First, what do bubbles represent?

Second, what does water clarity mean?

1. There are many kinds of organisms and bacteria in water. In addition to photosynthetic plants and bacteria, most aquatic organisms need to convert water (H2O) into oxygen (O) for energy exchange in cells in the body and to expel carbon dioxide.

Photosynthetic plants and bacteria, on the other hand, have different functions. They absorb the sun's spectrum, generate heat energy and convert carbon dioxide (CO2) into oxygen (O). Therefore, if you keep an aquatic plant tank, you are seeking ecological balance. The photosynthetic system receives light, absorbs carbon dioxide in the water, and emits oxygen for aquatic organisms to breathe. This is called a life cycle.

In the aquarium, except for a few friends who use a grass tank, most friends raise arowana in a bare tank or a fish tank with bottom sand. Therefore, there is a lack of oxygen production mechanism in the life cycle, and the oxygen content in the fish tank can only be increased artificially. However, the air pumped into the water is not pure oxygen, and oxygen, carbon dioxide and other oxygen bodies can be soluble in water, and the degree of solubility is quite high. The other immiscible parts, It will rise back into the atmosphere with the bubbles. Based on this concept, if the oxygen demand in the water is high, more gas will be dissolved in the water, so the bubbles will become smaller. The smaller and more bubbles there are, the better the water solubility. This is a state of equilibrium. However, if there are few small bubbles and more large bubbles, it means that the gas (oxygen or carbon dioxide) in the tank is saturated and the degree of oxygen dissolution in the water is insufficient. This is euoxic water quality, and then green algae will grow (sufficient light, saturated oxygen in the water) or brown algae (insufficient light, saturated carbon dioxide). Therefore, a normal, non-aerated tank should have many appropriate amounts of small oxygen bubbles. This is the method of observing the dissolved oxygen content by oxygen bubbles.

2. What does water clarity mean?

Why is the water turbid? What can cause the water to become turbid? The main causes are minerals, impurities, fish excreta (solid substances, such as feces, etc.), and chemicals (mainly chlorine from water plants, disinfectant water, and ammonia released by fish feces). Except for chemicals, the rest of the above items will settle due to their specific gravity with water. In theory, after two to three hours in the water, they will all sink to the bottom and make the water clear. However, the more serious problem is the chemicals in the water. Some chemicals are colorless and odorless, and are difficult to observe. Therefore, in order to eliminate these chemicals, manufacturers sell a product called water stabilizer. This is a chemical that destroys the molecular structure of the chemical in a chemical way, so that its toxicity cannot be exerted. But on the other hand, even if it is a chemical, it will cause damage to the water quality if used in excess. It should be used in moderation. If general water undergoes the aeration process, the toxic substances in the water will evaporate even without using water stabilizers. Therefore, except for the time when the water plant increases chlorine disinfection after rainy days, I will reduce the amount of water stabilizers used, and let it aerate naturally at other times.