The most common method for preventing and treating fish diseases is splashing. When spraying medicines, avoid overdosing, using the wrong medicines, applying solid drugs that are not fully dissolved, and applying sunscreen at noon. Careful operation to prevent the death of fish due to improper use of drugs. The specific method is as follows: The drug dose should be accurately calculated according to the volume of water and the concentration of spillage. Never increase or decrease the dose arbitrarily so as to avoid excessive or low doses of the drug, accidental drug use and effects of control. Feed the fish first and spill the liquid afterwards. When spilling the medicine, the medicine should be fully dissolved before use to prevent precipitation particles in the liquid and be eaten and poisoned by the fish. The best time for spraying is sunny hours at 9 am or 4 pm. In the morning, the water contains less oxygen, the water temperature is low, and the sun is in direct sunlight. After the medicine is sprayed, the lack of oxygen can easily cause dead fish or the control effect is poor. In the rainy days, the dissolved oxygen is low and the illumination is not good. The sprinkling of the medicine easily causes the fish to float. The floating head or floating head of the fish just disappeared, and the body was poor in quality. The medicine could not be spilled, otherwise it would cause a large number of fish deaths. Liquid spillage must be uniform, should start from the upper edge of the pond, gradually spilling into the wind, splashed around and corners. Spraying with a sprayer is better when spraying. The acid-alkaline drugs should not be mixed and spilled. The drugs should be dissolved in wooden or plastic containers to avoid accidents or reduced efficacy. And notice that the failed drug does not spill. Within 12 hours of sprinkling the liquid, observe the fish activity and find that poisoning immediately takes new water and other measures. NINGBO YOUHE MOTHER&BABY PRODUCTS CO.,LTD , https://www.oembreastpump.com