In the process of using drugs to prevent fish diseases, poor results often occur, and even fish diseases are more serious and cause death. The reason is mainly the following situations:
Drug failure: Drugs for prevention and treatment of fish diseases, especially bleaching powder and quicklime, are vulnerable to moisture failure. Therefore, look at the traits before use. The bleaching powder should be a dry, blocky powder, and the quicklime should be blocky. If necessary, determine the available chlorine. Normally, drugs should be properly kept according to regulations, and drugs that exceed the shelf-life should be avoided.
The water quality is too fat and the efficacy is reduced: Some drugs, such as copper sulfate, will be consumed in response to the rich organic matter, minerals, etc. in the water when used conventionally, thereby reducing the control effect.
Pathogens are resistant to drugs: long-term use of drugs in fish pests and diseases will produce anti-drug reactions, especially repeated use of the same drug, drug resistance enhancement is more obvious. The alternate use of various drugs during drug use is a simple and effective method to solve this problem.
Insufficient or excessive dosage: The volume of water before the medication and the inaccurate dosage are the main reasons for the shortage and overdose of medication. When the amount of drug is insufficient, the pool water may not reach the required concentration, resulting in poor control and prevention effects. Excessive drug doses will exceed fish tolerance limits and cause fish damage or death.
Inadequate Medications: Some fish diseases do not produce satisfactory results after one course of medication and require two or more courses of treatment. If the treatment is not enough and the pests and diseases are not completely destroyed, there will be a low cure rate or a relapse of the disease.
Incomplete dissolution of the drug: The solid drug drug is fully dissolved as required, and no particles or lumps can exist, so as to avoid being eaten by the fish. At the same time, the water body cannot reach the prescribed concentration, and the pathogen fails to kill.
Unsatisfied remedy: Blind administration of drugs is a taboo against fish diseases. In this way, the purpose of preventing and controlling diseases will not be achieved, but it will also cause waste and even side effects.
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