What is arowana like?
It is said that arowana is full of fantastic light, and its scales are particularly large. Under the light, it will reflect pink luster, which is not available in other ornamental fish. Therefore, arowana has extremely high breeding and ornamental value. Arowana has always been regarded as a sacred fish in Southeast Asia, Hong Kong, Macao and Taiwan, and places where overseas Chinese are concentrated, and it is also regarded as a feng shui fish to ward off evil spirits in Wang Jiazhen. Among them, arowana, in particular, has been listed as a class A protected animal because it is on the verge of extinction, and its price is relatively high. In Hong Kong, Macao and Taiwan, the price of one-stop fish is more than one million yuan, which has become a symbol of family wealth and status.
According to relevant data, arowana is a very old large tropical ornamental fish, which belongs to Ostracoda and is an ancient fish. Its reproductive ability is weak, and the hatching and feeding of young fish are very strange. Usually, females lay eggs, males hatch and raise them in their mouths. Because of its two beards, shiny scales and its ancient life experience, people naturally associate it with the legendary dragon in China, so they call it "arowana", and raising arowana is also regarded as people's desire and vision for blessing, prosperity and wealth. But arowana has different names in different areas. For example, it is called "Arowana" in Chinese mainland, "Dragon Tuzhu" in Hong Kong, "Silver Belt" in Taiwan Province and "Silver Boat Sword" in Japan.
Roaring fighter-arowana (Figure)
Arowana can also grow aquatic plants (Figure)
Arowana is found in Asia, South America, Australia and Africa. Its main varieties are Red Dragon, Orange Red Dragon, Bai Jinlong, Red-tailed Golden Dragon and Blue Dragon. Produced in Indonesia, Malaysia and Thailand in Southeast Asia, Silver Dragon, Black Dragon, Walrus and Star Dragon in Africa, South America and Australia. Generally speaking, Australopithecus Australopithecus, also known as Australopithecus Australopithecus, has a body length of 40 to 50 cm, has strong adaptability to water quality, is easy to raise, and is low in price, but there are not many breeders. Qinglong, also known as Qingjinlong, has a body length of 60 cm and a strong physique, and does not require high water quality; The length of silver dragon 1 m is cheap and easy to maintain. The black dragon is about 1 meter long, which is expensive and difficult to raise. Jinlong, also known as Yellow-tailed Jinlong, is about 60 cm long and has high ornamental value and price. The red-tailed golden dragon is about 69 cm long and has a high price. The price of young fish only 10 cm to 12 cm long is more than RMB 1000 per fish. Red dragon, listed as the first-class protected animal in the world, is about 60 cm long. Like the giant panda in China, it is the most expensive freshwater ornamental fish. It is understood that arowana and arowana are popular in China, among which red dragon and golden dragon with back are rare species.
"The real viewing of arowana is not as simple as simply looking at it with your eyes." Probably because of the high price of arowana, there are not many aquarium shops selling arowana in the ornamental fish area of Laitai Flower Exchange Center, but if you can bear it, it is not difficult to pick a few satisfactory arowana. The owner of an aquarium shop selling arowana told reporters that to see arowana, we must first look at the tentacles. Tentacles are extremely important to arowana. Good arowana tentacles are straight and the color is the same as that of fish. The second is to look at the eyeball. A good arowana eyeball should be as huge as a searchlight and rotate flexibly; Furthermore, the epidermis of arowana's head should be as smooth and bright as possible, and there should be no wrinkles; Moreover, the upper and lower lips should be closed. If the jaw protrudes or has a tumor-like process, it can't be said to be a good mouth shape. In addition, pay attention to the color of the upper and lower lips, whether it is consistent with the color of the fish. In addition, the scales of arowana are large and neat, and they look very shiny. If there are spots, it will be even worse. The gills of arowana should also be neat and shiny, and there should be no sag, and the gills should not be curled; The pectoral fin of arowana, like the claws of arowana, is a symbol of its ferocity, so it should be stretched as neatly as possible, and the shape of the fin should be like drawing an arc; However, it is required that the fins of the gluteal fin, dorsal fin and caudal fin should be straight, and the caudal fin should be large, so that there will be no fin contraction when turning. "basically pay attention to these aspects, you can buy better arowana."
However, because there are quite a few kinds of arowana, and the prices vary greatly, how much money is the first condition to buy arowana. For example, it is impossible to buy a red-tailed dragon with a budget. At the same time, it is best to buy medium-sized arowana above 25 cm, because it is easier to distinguish the beauty and ugliness of arowana at this stage, and it is generally not easy to see it.
Arowana lives near the water surface and rarely dives to the bottom. The first consideration in raising arowana is width. If the width of the aquarium is not wide enough, it will cause problems such as spine bending, eye drops and gill roll!
It is best to put the aquarium in a place with proper light, good ventilation and avoiding excessive noise. Aquarium should be placed firmly, easy to observe and easy to change water.
The aquarium for feeding arowana should be at least 120cm×50cm×50cm (length× width× height). Of course, aquariums of 150cm×60cm×60cm and above are the best! When feeding arowana, it is best to put it in a big fish tank at first to avoid frequent tank changes, which may easily hurt arowana.
Second, the filtration system (key)
Arowana is a carnivorous fish with a huge body, and a large amount of excrement can easily sink into the bottom sand. If the design of the bottom filter you use is unreasonable, the bottom sand may become a "cesspit" and a hotbed of bacteria. No matter how you change the water, it won't help!
It is suggested to feed arowana in two filter barrels outside the tank to form a water vortex in the fish tank, and then add a water inlet of submersible motor at the water vortex, so that feces and residual bait can be easily sucked into the filter, or a filter barrel outside the tank and a filter can achieve the same effect. At the same time, using these currents can also form a suitable current in the fish tank, which can help the arowana move, and can also replace the wave motor when the current is large and the fish tank is small!
At the same time, perfect biological and biochemical filtration should be established to achieve ecological balance. It is best to use some chemical adsorption and filtration materials such as activated carbon and zeolite in the system. It should be noted that this kind of filter material only has a service life of 2-3 months, and it must be replaced when it expires.
Three. light units
It is best to use lighting equipment to raise arowana in fish tanks. With the help of lighting, you can observe the "one-for-one smile" of arowana, and also promote the color and metabolism of arowana! In order to achieve the effect of natural light, halogen lamps and ultra-bright lamps are recommended.
Four. Temperature control equipment
The water temperature for feeding arowana is between 24℃ and 29℃ (preferably between 26℃ and 28℃). Although arowana can adapt to the harsh environment, if the water temperature changes too much, it will also produce uncomfortable symptoms. Therefore, a set of good quality temperature control equipment is essential! Because arowana is huge and powerful, the heating rod should be made of timely or stainless steel, not glass! It is best to use two heating rods, one of which is invalid and the other is standby, so as not to let the temperature in the cylinder drop too fast!
Verb (abbreviation for verb) oxygen-increasing equipment
The function of the aerator is to increase the oxygen content in the fish tank. Because of the large oxygen consumption of arowana, the aerator is particularly important in fish tanks.
Water quality control of intransitive verbs
PH: Arowana prefers medium-sized water with weak acidity of 6.5 ~ 7.5.
As for the water changing period, due to the efficiency of the filtration system, the size and quantity of fish and other factors, it is suggested to change the water regularly once a week, and the amount of water changed once is 1/3 ~ 1/4 of the total water in the fish tank.