First, disease prevention Goldfish live in water, and it is quite difficult to observe, diagnose and treat fish diseases. If you don't observe carefully, diagnose in time and the treatment plan is uncertain, it will cause goldfish to get sick. Once the goldfish gets sick, it will be difficult to treat and isolate. Therefore, early prevention is an important measure to prevent fish diseases. There are many reasons for the occurrence of fish diseases, and it takes many ways to achieve the purpose of prevention. The general preventive measures are: (1) cleaning and disinfection 1, cleaning. For newly-built fish ponds or newly-bought fish rainbows, they should be carefully washed before use, and must be filled with clear water for at least three days, especially for fish ponds newly built with cement, which contain alkalinity and must be removed. The method is as follows: (1) Eucalyptus is dissolved in 50kg water12g phosphoric acid, and the new pool1-2 days can be soaked with this water to achieve the purpose of alkali removal. Then rinse it with salt water or potassium permanganate melt, and fill it with old green water to soak it for about 1 week (to promote the generation of moss very early), and replace it with new water and a small amount of old water. It is safe to raise several inferior fish first, and then raise goldfish. (2) Dissolve alum in the pool water (its concentration must reach the saturation level of alum), and after 2-3 days, the purpose of alkali removal can be achieved, and then fresh water can be used. 2, disinfection. Fish ponds (tanks) that have not been used for a long time should be disinfected with salt water or potassium permanganate solution before use. (2) Strengthening feeding management Most goldfish get sick because of improper feeding management. Therefore, strengthening feeding management, improving water quality environment and paying attention to operation are important measures to prevent diseases. 1, do a good job of feeding "three fixed" and "one training". (1) qualitative. Feed should be fresh and clean, and do not feed rotten feed. (2) quantitative. According to different seasons, climate change, fish body size, appetite response and water quality, feed properly and master the principle of "better less than more". (3) timing. There should be a fixed time for feeding, usually at 7-10 in the morning when the sun begins to shine on the pool (tank). However, it can be advanced in summer and postponed in winter. Pay attention to eating less at noon and avoid eating in the evening. (4) training. When feeding every day, you can use gentle tapping on the water surface or other sounds to train for a long time at will, so that you can see the sick fish that can't grab the food in time. 2. Keep the water clean. The water surface of the fish pond (tank) is in direct contact with the air. If the water surface is densely covered with dust or oil slick, it is not only because the oxygen in the air is dissolved in the water, but also the dust and dirt are easily absorbed in the gills of goldfish, which is not conducive to the goldfish's breathing. In addition, after sun exposure, many fish droppings and bottom dirt will also float to the water surface, preventing oxygen from dissolving in water. Therefore, cleaning the water surface every day is very beneficial to the water quality. Sucking fish manure, residual feed and sediment at the bottom of the tank every day can reduce the decomposition of fish manure and dirt in water and release harmful gases (such as carbon dioxide and hydrogen sulfide), so as to purify the water, prevent the water in the tank from being too acidic, and also prevent some parasites and bacteria from harming goldfish. And the old water is sucked away, and some new water can stimulate the goldfish to grow and develop better and create a good living environment. Secondly, the recovered red worms should be carefully rinsed before feeding, which is also one of the important links to prevent parasitic fish diseases and keep the water clean. 3, careful operation, strengthen observation. No matter when changing water or catching fish, the action should be handled with care. When goldfish are temporarily kept in cages or pots, it is necessary to prevent excessive squeezing and lack of oxygen, so as to avoid scratching the fish or bumping into flat blisters, and reduce the chances of bacteria and parasites taking advantage of deficiency to enter, thus preventing and reducing the incidence of fish diseases. (III) Drug Prevention In the season of frequent fish diseases, in addition to the above-mentioned measures to prevent fish diseases, it is necessary to adopt some drugs to prevent them. Now, it is briefly introduced: 1, fish disinfection. In the epidemic season of fish diseases, when the water in the tank (pond) is completely changed, 10 mg/L potassium permanganate solution can be used to wash the fish pond; Every 10 day, you can use 2%-3% salt solution, and then every 10 day, you can use 2-3 mg/L of furacilin liquid medicine (but only use one liquid medicine at a time) to soak and wash goldfish in cycles. The bathing time depends on the size of the fish, and the health situation can be flexibly increased or decreased, generally not exceeding 10 minute. At the same time, in the outbreak season of fish diseases, a small amount of salt (the ratio is1:5000 or1:10000) can be put into the goldfish pond (tank) at discretion, which has a great effect on controlling and reducing the incidence of fish diseases, especially on the prevention and treatment of water mold and myxococcus. 2, tool disinfection. Daily utensils such as red worm bag, fishing net, basin, spoon, etc. should be exposed to the sun frequently and regularly soaked in potassium permanganate, trichlorfon solution or strong salt boiled water for disinfection. In particular, utensils that come into contact with sick fish should be isolated and disinfected. Second, the treatment method once the goldfish has a disease, even if the best medicine is used, it is quite difficult to treat it, especially the fry and young fish are extremely delicate, so the medicine should be used more carefully. The commonly used methods for treating fish diseases mainly include: (1) Oral administration is a method of feeding the goldfish with drugs into the feed, so as to achieve the purpose of prevention and treatment. This method is often used for prevention or early stage of fish diseases. Because if the sick fish lose their appetite, this method will not work. Drugs mixed into feed should be nontoxic, such as furazolidone, allicin, furacilin, oxytetracycline, sulfonamides and vitamins. (2) Bath-washing method: A method of soaking sick fish in a liquid medicine prepared according to a specific ratio to achieve the purpose of treatment, which is suitable for individual fish or small batches of sick goldfish. Specific usage:1.Determine the size of the container according to the number of sick fish, put 2/3 of fresh water, then prepare the drug solution according to the dosage of various drugs and the required concentration of liquid medicine, and according to the fish size and water temperature, and then immerse the sick fish in the drug solution for treatment. 2. The bathing time depends on the size of the fish, the water temperature, the concentration of the liquid medicine and the health of the goldfish. Generally, the fish body is large, the water temperature is low, the concentration of liquid medicine is low and the health condition is acceptable, so the bathing time can be longer. On the contrary, the bath time should be shorter. 3. Precautions (1) When bathing, don't leave people. When bathing sick fish, don't leave people. If you find that sick fish have adverse reactions, such as swimming wildly, twitching and turning white, you should immediately put the fish into fresh water for oxygen rescue. Don't be careless and cause unnecessary losses. (2) The sick fish after bathing and washing should be fished into fresh water for rinsing and then fished into the pool (tank), and then used with light green water, oxygenated with an oxygen pump to rest, and stopped eating or ate less, and basked more. (3) Splashing method Splashing the whole pond (tank) in proportion in the diseased fish pond (tank), the whole pond can be splashed according to the proportion of the liquid medicine of the splashing method, which may improve the therapeutic effect of fish diseases. If the area of the pool (tank) is too large, the sick fish can be dragged to one side of the pool with a fishing net, and then the liquid medicine is spilled in the fish school, so as to achieve the purpose of treatment. When preparing the liquid medicine, it is better to have a lower ratio than the prescribed ratio than to have a higher ratio. If the concentration of liquid medicine is too high, once an accident occurs, it will easily cause a large number of goldfish to be poisoned and die. And a little lower, you can also make up the liquid medicine. In short, the prevention and treatment of goldfish diseases should implement the principle of "prevention is more important than cure". Do frequent observation and careful inspection; Early detection, early treatment. Release date: 2005-1-71:16: 00 Source: This information is for reference only, please verify it before use. Related articles Prevention and treatment of bacterial gill rot of freshwater fish Prevention and treatment of common diseases of Onion fish Analysis of the causes of death of cultured scallops Prevention of floating head of fish See the symptoms as soon as possible Diagnostic text advertisement of "luminous" disease of prawn seedling for Tenebrio molitor, earthworm, maggot and Eupolyphaga various pesticide information enterprises to show the new hope of getting rich with high-yield big cherry. Putian City, Fujian Province provides muscovy duck seedlings. Shandong Zhaofeng Fruit Tree Cooperative provides aquaculture education technology for crabs. 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