Eye drops are the most common in "Silver Belt" and "Asian Dragon" (mostly monocular), but rare in "Black Belt" and "Australian Dragon". Usually, the most common answers on the market are nothing more than "feeding submerged bait" and "not laying bottom sand leads to man in the mirror"; Preventive methods include "putting table tennis", "bedding or bottom sand" and "setting an underwater lamp to shine upward". But these are all rumors in the market, and there is no actual basis at all!

1. Most of the arowana kept by players all their lives are live bait, which will sink to the bottom after feeding. Even if the fish were completely released from the tank and left to fish by themselves, there was never any eye drops.

2. There is a saying that polyculture of multi-tailed fish can make arowana pay attention to its surroundings and prevent the rectus muscle on the eyeball from relaxing, but it still falls out of the eye. ...

3. Some people say that if benthic fish are mixed, arowana will lose its eyes because it looks down, so it adopts "single culture", but it still loses its eyes. ...

4. The author has also observed for a long time that there is a shop that raises dragons by lighting lights in submerged water, but after a period of time, some arowana will still lose their eyes, and the swimming posture of arowana nearby is also crooked.

5. There are many people who put dark rock slabs or bottom sand on the bottom of the tank, but there are still examples of their own arowana falling out.

Well, I've said a lot. Why should I specifically declare the above statement? It's because I visited a fish shop recently and heard someone mention related problems, almost all of which were influenced by rumors and conformity in the market. Just like they think that the light from the submerged water shines obliquely from the bottom up, which will make the eyes of arowana afraid to look down because of the light? Moreover, the bare bottom of the tank will cause the arowana to look down at its figure due to the mirror effect, which will lead to eye loss? The problem is that you should know that if you look at the bottom of the fish tank from the front, you can see the mirror image of the fish, but in fact you are diving into the tank with a frog mirror, and there is no mirror to look down. In fact, there are many interesting prevention methods, which are fabricated by naive people according to their own artificial theory. For example, arowana will stick a poster or dried fish on the fish tank, or put a floating ball on the water, so that arowana will not lose its eyes because it has been watching for a long time. But arowana should not be an idiot! At first, I may pay attention to it out of curiosity, but over time, Arowana has become accustomed to these lifeless furnishings and even stopped looking at them. So "theory is theory after all, far from reality"!

Arowana has a wide field of vision. Usually, individuals swimming in a tank observe the changes of the external environment while swimming. If it is kept in a bad light environment, it will "shorten the vision of arowana", and when the lights in the fish tank are turned off, it will only illuminate the periphery of the fish tank and induce it to look sideways at the bright place below. This unnatural action makes it difficult for arowana to open its eyes. Fish friends who keep dragons can do an experiment by themselves: first turn on the lighting in the fish tank, and then turn off all the indoor lights in the place where the fish tank is set. ※. At this time, the dragon will start swimming around against the glass curiously or anxiously, squinting at everything outside ... Hehe ... Similarly, if the arowana is kept in the dark for a long time, only the light in the tank is on, otherwise the fish tank will be on for 24 hours. Therefore, it is best to put the fish tank in a well-lit place (if the indoor light is bright enough, the fish's field of vision will be lengthened and they can see far away), but not in the direct sunlight (algae prevention), and give a clear day and night schedule. Adequate lighting refers to the light of the whole environment, not just the fish tank lighting. The trouble is that if the home is in the center of the "townhouse", the living room may be a little dark. In addition, it is worth mentioning that the wild arowana is used to floating on the water to look for bait, and its eyes can observe the changes in the water and on the water at the same time (the strange eye structure can be divided into upper and lower sides at a glance, and the Discovery Channel has an explanation), so we can use a transparent tube cover (glass or 8㎜ acrylic) and a plastic net according to its habits, so that it can watch the scene outside the water.

What if the young dragons and Asian dragons at home are not very eye-catching? The author's predecessors have had examples of cure. He moved the coveted arowana into a black opaque plastic bucket with a diameter of 120㎝ and put it on a well-lit balcony. After two months of domestication, he moved back to the original jar for observation, and his eyes actually returned to normal. Of course, there are fish friends who are afraid of trouble, but the effect is slow. At present, there are eye drops in fishing grounds in Southeast Asia. After anesthetizing arowana, they shaved off the fat accumulated in the eye socket with surgical scissors, but at present, it is not known whether this method will affect the sensitivity of arowana's eyeball, so inexperienced people should never try it easily. I want to catch an old silver belt with serious eye drops.

If the old dragon's eyes at home are slightly tilted downward (aging leads to the relaxation of the rectus muscle on the eyeball), then the player will change his personal mentality because he is old!

Conclusion ~ ~ In order to prevent eye drops, the position of the fish tank is very important! !

Maxillary and maxilla are incompatible with congenital genes; Acquired feeding

Commonly known as "fighting", there are two main situations ~

First, because the parent fish itself fights, its offspring also inherit this feature. When it was a child, its lower jaw was slightly higher than its upper jaw (it is not easy to tell without careful observation), and this appearance became more and more obvious as the fish grew up.

Most people only pay attention to the color, bottom material, whisker and fin size of the frame, and often ignore the hidden worries in this regard. Therefore, if you regret it afterwards, it is better to plan ahead and choose fish carefully. If you buy a hereditary dragon fight, you don't need to be sad. Although fighting is a small flaw in aesthetic concept, on the contrary, isn't it the best feature of Asian arowana or silver belt?

Swimming fatness, commonly known as "submarine", generally occurs in the young fish of 10~ 15㎝. When swimming, the head always dives, and even the abdomen is hollowed out in severe cases. At present, the reason has not been solved, and it is a special case of Arowana, but there are several sayings in the market (for reference): First, when young fish are imported by air, they can't adapt to the cabin pressure, which leads to the imbalance of fish airbags and no obvious symptoms in a short time. As they grow, they actually swim at an angle of 45~60 degrees from beginning to end. Second, the external force or excessive temperature difference causes the oval hole of the fish to be unbalanced. 3. Arowana has the habit of swimming against the current. Proper current can help it move, but excessive pumping will cause it a great burden, making its head always dive slightly when swimming against the current. Over time, some individuals will experience "habitual" diving (physical injury, small angle). None of the above three conditions is a disease, so there is no specific medicine. The only improvement method → raising the water level to 65438+ 0~2 times of the arowana height, feeding patiently (long-term physical compulsory treatment), there have been examples of improvement, but there is no guarantee that it will be effective. ※. In addition, some people will add salt during physical therapy, but the "fat regulation" of fish has little to do with the "osmotic pressure (tissue blood) regulation" of salt bath. Fourthly, protozoa parasitism or bacterial infection causes visceral edema, which oppresses fish body fat and makes it unable to regulate normally. At this time, the fish will only swim to the surface and inhale frequently to keep balance. At this time, only protozoa or antibiotics can be used for treatment. ................................................................................................................................................................

The external pressure of fin breakage mostly occurs when moving the cylinder or disturbing the fish, which makes the fish fin (caudal fin at most) "cut itself" because of urgency. If the broken part is still attached to the fish skin, if you don't pay attention, some will break naturally and some will attach to it. If this goes on, the broken part may be fixed in a strange shape and even form a sarcoma. We can completely cut off the adhered joints by anesthesia. ※ If the fin is only half broken, it will generally regenerate beautifully along the original fin; If it is completely broken, the small fish will grow out in about a month, and the big fish will take longer, but most of the regenerated fins are wavy.

The environmental pressure of self-biting caudal fin can't be observed by professional microscopic sections. If we only consider it literally, most fish friends should subjectively think that it may be caused by insect disturbance or microbial infection. Maybe some are, but not all. How can I put it? From the mouth of several players who actually had this situation, it was learned that they only had this situation after replacing the arowana with a vat, and its symptoms were "rotating and biting the tail fin from time to time", and some people would stop this strange phenomenon after a period of time; However, some individuals will cause serious damage to the fin surface, secondary infection, and increased self-harm behavior, and they cannot save themselves. At present, the real reason is unknown, but a Japanese translation once mentioned that Arowana felt uncomfortable because of the "huge environmental gap". ※ Players can try to make the overall environment (change the environment as much as possible) darker, and put some smooth and angular big driftwood or big banyan, pepper grass, big fountain, crown grass, small sea sail, etc. For its attachment, it is said to have a stabilizing effect. If the caudal fin has long been seriously damaged, please don't put aquatic plants (afraid of drugs) and "heal" first!

The gill cover cartilage of fish will turn over, and even the hard bone will be deformed in severe cases. There are many reasons for this situation, such as insufficient oxygen, too cold or too hot water temperature, poor water quality (inorganic salt accumulation), too small fish tank (pressure), too large water flow and so on. However, according to the actual experience of players, no matter what the environment, arowana usually living in good water quality will not have this symptom, so it has the greatest relationship with "poor water quality" (especially in the environment where water is only added without changing water, the conductivity is extremely high). There was once a theory of "vertical pump", the principle of which was that arowana had the habit of swimming against the current, and moderate water flow could make its gills roll smoothly, but this theory did not achieve practical results through experiments. Therefore, it's best to make a quick decision at a slight time, perform anesthesia immediately, cut off the rolled cartilage to avoid further deterioration, and at the same time "improve the water quality", and it will grow back in a month or so. ※.

Humpback ~ ~ environment; The malnourished arowana suddenly appeared, and the second half of its body became more and more droopy, which looked like a "ㄟ" shape as a whole. This is very unsightly to the owner, but it is extremely unfair to the fish, because all the mistakes are caused by the owner. If you want the horse to be good, but you don't want it to eat grass (the fish tank is small and the bait is fixed), this poor fish-raising mentality will hurt the fish and hurt yourself (being reviled by fish friends), so it is better not to raise it. The aquarium for keeping dragons should be at least 5×2×2. If arowana is kept in a narrow space for a long time, even if the bones are not deformed, it will eventually become a short and fat arowana. If there is enough space, arowana still has bone deformation, so we should start with nutrition. ※. Usually, diversified bait feeding will not cause this symptom.

Off-cylinder ~ ~ indigestion; Disease complications most often occur in the juvenile stage of fish under 25㎝. When eating "hard (especially dry black-shelled shrimp and shelled shrimp)" or "poor water absorption" bait, some individuals with poor digestive system will have anal protrusion. Usually, after a period of "fasting", you can slowly recover. If you are worried that it is hungry, you'd better use the newly shelled white bread worm or soft artificial feed as bait. Besides, "gastroenteritis" and "ascites" will also be accompanied by anal swelling. ※. If the fish friend's dragon baby belongs to this cause, you can buy gastrointestinal medicine in the colorful shop. Some players suggested buying gentamicin or chloramphenicol for injection, injecting it into live bait first and then diminishing inflammation for the son of the dragon. ※. It is best to give it once every two or three days, and don't give too much medicine. Arowana is smart, the medicine is too bitter, and it won't eat it too many times. Title: Disease Prevention Author: Serina Liu

White spot disease is the most common disease of ectoparasites, and its main reason is the introduction of external sources, or ICH ciliates are infected by fish because of the deterioration of water quality and excessive temperature difference, resulting in acute weakness of resistance. When parasitic on the body surface of fish, it will absorb the body fluids of fish and reproduce, resulting in white spot cysts, which are mostly produced in the fins at the initial stage and then spread to the whole body. It looks like white sugar scattered all over the body. Infected fish will rub the tank wall and decorations to stop itching, resulting in skin damage and secondary bacterial and mold infections. At present, there are many kinds of drugs for treating leukoplakia on the market, which can be combined with hyperthermia treatment. Salt bath be also good. ※. Under normal circumstances, it is not easy to get this disease when the fish tank is kept above 28℃. Although leukoplakia is easy to treat, it should not be underestimated. If your fish has been habitually infected for a long time, it means that it was just to inhibit growth or drive away, and may even have escalated into stubborn white spot disease, hiding in the substrate and waiting for an opportunity. At this time, only the fish will be fished out, disinfected with high concentration of rich marin, and then the cylinder will be reset.

The ectoparasite of pepper disease is infected by ectoparasite, and its cause is similar to white spot disease, but its appearance is smaller than white spot disease and its color is beige and yellow. The infected fish is not serious in the early stage, but mucosal hyperplasia will appear on the body surface in the later stage (which is easy to cause bacterial infection), which is worthy of attention. Generally, universal water can be used for treatment, and water can be changed and medicine can be added appropriately every few days until the fish is cured. ※.

The water quality of swollen spot disease is not recorded in general magazines, and it is a very special and rare exclusive strange disease of arowana. It looks like leukoplakia, but the particles are bigger and more convex. It looks like a long white sarcoma. It also extends from the fin surface to the body. In severe cases, it is usually accompanied by acne on the beard and even growth on the eyeball. When the number increases, you will find that most of them are side by side at the edge of the last three fins, and sometimes white secretions are produced! This disease is very difficult. I had a strange disease in Qinglong before. Before I really knew the cause, I ate bacteria, mold, worms in my body, worms in vitro, and brand-name universal water ... but they were only slightly improved but could not be completely cured. The biggest difference between this strange disease and the above two diseases is that "no matter how serious it is, it will not affect appetite"! ※! Later, I thought it was better to "focus on water quality", so I left it alone, but the frequency of changing water increased obviously, and it would take half a year to recover without taking medicine. I once saw the same strange disease in Jin Honglong of a well-known Volkswagen store. I asked the manufacturer at that time, and he didn't know the situation himself (after all, this disease is relatively rare), but only introduced some chemotherapy methods unrelated to the theme. Of course, his dragon itself cannot be cured! Later, I observed that the store changed its storefront and changed its vats, and the fish was cured without medicine. From the foregoing, it can be seen that water quality should be the main concern, so the problem lies in the water in the old water tank.

Beard has a tumor ~ ~ ~ The water quality must have a small sarcoma, which looks like a brush from a distance and is often mistaken for a mold infection! It most often happens to arowana who has the habit of "grinding jars". Because of long-term wear and tear, beard epidermis tissue is injured, and because of poor water quality and the influence of pathogens, inflammation and swelling are detonated. "Long-term" water quality improvement can probably be cured without taking medicine. If the player thinks it is an eyesore, the quickest way is to anesthetize the arowana first, then scrape off the sarcoma by hand, and finally put some yellow medicine on the wound and put some yellow medicine in the water to prevent the wound from bacterial infection. ※. However, some people may grow small sarcomas again in a period of time. At this time, directly cut off the beard by anesthesia (cut off the root of the disease) and let it grow back, so that the newly grown beard will not grow any foreign bodies in the future. But arowana, like human beings, will recover more quickly with the increase of age, which is worth pondering! In addition, there are also cases in which pimples subside after fishermen "move to a new tank", because the water in the original tank has been seriously deteriorated (containing irritating impurities), and it is of no help to change the water moderately. Excessive feeding of "concentrated nutrients" will also lead to the growth of foreign bodies in the dragon whiskers, which players should pay special attention to! !

Head hole disease ~ ~ ~ nutritional deficiency; Protozoa have a porous appearance. At this time, Arowana "has no anorexia", which is a nutritional deficiency (vitamins and minerals) caused by long-term feeding of a single feed. You can inject multivitamins into the jar to supplement its nutrition, and it will be fine in a few days. ※.