Identification and use of common fish medicine

1. Antibacterial ⑴ furazolidone, also known as dysentery. [shielded] powder, tasteless, broad-spectrum antibacterial effect, low toxicity, oral medicine bath can be used to prevent and cure eel rotten Gill, enteritis, red fin disease, red spot disease. Orally, 1520 grams per 100 kg of feed, a course of 3-5 days; medicine bath, sprinkle powder liquid in the whole pool according to the amount of 2 grams per cubic meter. As the drug is insoluble in water, it can be soaked and mixed with alcohol before use. ⑵ chloramphenicol. White powdery medicine, soluble in water, is effective in the prevention and treatment of Gram-negative and Gram-positive bacteria. It is mainly used in the treatment of eel enteritis, vibrio, Edward's disease and skin rot. Orally, 30 grams per 100 kg of feed for 3 to 5 days for early prevention and treatment. ⑶ oxytetracycline. Earth [shielded] powder, with antibacterial and bacteriostatic effect, can be used to treat a variety of bacterial diseases, mainly oral, 40 grams per 100 kg feed for 5 days.

2. Insecticidal ⑴ mixture of copper sulfate and ferrous sulfate. The two drugs are transparent blue and green crystals respectively, so they are also called blue alum and green alum, which have strong convergence and insecticidal effect, and have toxic effect on Chinese fish flea, rotifer, oblique tube worm, tongue cup worm and so on. 0.7 grams per cubic meter of water, including 0.5 grams of copper sulfate and 0.2 grams of ferrous sulfate. ⑵ crystal trichlorfon. The pure product is a white solid, containing 90% of the active ingredient, which is soluble in aquatic dichlorvos and can poison and kill a variety of parasites. 0.7 grams per cubic meter of water, should be applied in the morning, but should not be used in combination with alkaline drugs such as lime, so as not to poison fish.

3. ⑴ formalin for both insecticidal and bactericidal purposes. It is a water-soluble solution containing 40% formaldehyde, with a strong pungent smell and a strong broad-spectrum insecticidal and bactericidal effect. Generally, the dosage of 25 grams per cubic meter of water can be increased to 40 grams when the disease is serious, which has a good effect on the prevention and treatment of eel Gill rot disease, red fin disease and freshwater fish skin rot disease and perforation disease, but the drug is easy to volatilize and fail in the sun. therefore, the application should be carried out in the evening or at night to improve the effect of insecticide and sterilization. ⑵ potassium permanganate. Purple slender crystal, soluble in water, strong insecticidal and sterilizing ability, mainly used to kill bacteria and parasites on the body surface of fish.

4. Matters needing attention: ⑴ water body measurement and drug dosage should be calculated correctly. A part of pond water is discharged before ⑵ is used, which can save the dosage and reduce the cost. Water is added or changed after ⑶ medicine bath for 8 hours to regulate the water quality. ⑷ if the diseased fish swim rapidly after medication, it means that the concentration is high, and the application and change of water should be stopped immediately. ⑸ liquid should be spilled evenly, and cooperate with the aerator to increase oxygen.