Practice has proved that even very strong fish species will have more or less certain pathogens. Dipping and disinfecting the fish body with the liquid medicine is an indispensable work for putting the fish seedlings and is an effective measure for preventing fish diseases. Now introduce the preparation and application methods of several commonly used dipping disinfectants.
The bleaching liquid is prepared with 100 kg of water and 1 g of bleaching powder, that is, a bleaching solution with a concentration of 10 ppm. When the water temperature is 10-15°C, the fish body can be soaked for 15-30 minutes to kill the pathogenic bacteria on the fish body, which has a good effect on the prevention of bacterial erythroderma and gill rot disease.
Potassium permanganate solution is prepared by dissolving 2 g of potassium permanganate per 100 kg of water, that is, potassium permanganate solution with a concentration of 20 ppm. At 10-20 °C water temperature, the fish body is soaked for 20-30 minutes. There are special effects on the monophyletic flukes and anchored maggots, which can kill the third-generation worms, ring worms, trichoderma and oblique tubers of parasitic fishes.
The copper sulphate solution is prepared by dissolving 100 kilograms of water into 0.8 grams of copper sulphate, ie a copper sulphate solution with a concentration of 8 ppm. Dipping the fish for 20-30 minutes at a water temperature of 15°C or lower can kill parasites such as worms, worms, worms, caterpillars and caterpillars. Parasite-induced fish diseases have a certain effect.
Common salt solution concentration of 3% -5%, that is, 3-5 kg ​​per 100 kg of water-soluble salt. Dip the fish for 10-15 minutes at a water temperature of 10-15°C to kill the trichomonads, cup worms, slug worms, bacteria, and water molds on the fish body. This will prevent bacterial gill disease and water blight. Disease and some parasitic diseases have a good effect.
The trichlorfon liquid is prepared at a dosage of 50 g of 90% crystal trichlorfon per 100 kg of water. Generally, the fish is immersed for 5-15 minutes. It has specific effects on the monophyletic flukes and anchor heads. It can kill the third-generation worms, ring worms, and anchor larvae of parasitized fish, preventing the parasites from causing them. Disease has a good effect.
The mixture of bleaching powder and copper sulfate is prepared with a dosage of 1 gram of bleach and 0.8 gram of copper sulphate per 100 kilograms of water. The two drugs are first dissolved in water, and the two drugs are mixed in use. At 10-15°C water temperature, dipping fish for 20-30 minutes has a certain effect on the prevention of bacterial fish diseases and fish diseases caused by some parasites.
Note: (1) Only one kind of medicine can be selected when using the above several kinds of medicines. (2) The liquid must be used with it. (3) The amount of drug to be measured is accurate, because some drugs that can kill pathogens have a concentration close to the lethal concentration in fish, and the concentration is too high. The safety of fish cannot be guaranteed; the concentration is too small to kill pathogens, so it is not possible to increase the drug at will. Liquid concentration or extended immersion time. (4) Use wooden or plastic basins and barrels to prepare liquid medicines. It is not advisable to use metal containers to make liquid medicines. (5) Feeding fingerlings should be performed at a sunny temperature of 10-15°C, but potassium permanganate solution should not be used under direct sunlight. (6) Operate carefully and do not injure the fish body. (7) When dipping fish seedlings, they must not be separated from the human beings. Attention should be paid to observation. If abnormal conditions are found, such as floating heads, snoring or turning over, remove the pool immediately to prevent death from poisoning. (8) The disinfectant after use should not be poured into the pond.
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