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Bag-disinfection method for fish fry and fingerlings stocked in spring

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"Bag disinfection" of fish fry and fingerlings is a new disinfection method summarized and used by fish farmers in recent years. Its advantages are that it is simple and convenient, costs little, can reduce fish diseases, and gives a high survival rate. The method is: 1. Operation (1) Place the nylon bag holding the fish fry and fingerlings at the pond edge (untie the bag opening), with the water level inside the bag level with that outside. (2) Pour the medicinal solution into the bag and shake well, and observe the activity of the fish fry and fingerlings; after the disinfection time is completed, put them into the pond. 2. Drug preparation and soaking time (1) 3%-5% salt solution, soak the fish fry and fingerlings for 20 minutes, can prevent and treat bacterial diseases

"Bag disinfection" of fish fry and fingerlings is a new disinfection method summarized and used by @#@233@#@ households in recent years. Its advantages are that it is simple and convenient, costs little, can reduce fish diseases, and gives a high survival rate. The method is:

1. Operation (1) Place the nylon bag holding the fish fry and fingerlings at the pond edge (untie the bag opening), with the water level inside the bag level with that outside. (2) Pour the medicinal solution into the bag and shake well, and observe the activity of the fish fry and fingerlings; after the disinfection time is completed, put them into the pond.

2. Drug preparation and soaking time (1) 3%-5% salt solution, soak the fish fry and fingerlings for 20 minutes, can prevent and treat bacterial diseases. (2) Use 10-15 mg/L copper sulfate solution to soak the fish fry and fingerlings for 15-20 minutes, can prevent and treat trichodinosis, costiasis, capillary worm disease, etc. (3) Use 10 mg/L bleaching powder solution to soak the fish fry and fingerlings for 20 minutes, can prevent and treat bacterial skin disease, gill disease, etc. (4) Use 20 mg/L potassium permanganate solution to soak the fish fry and fingerlings for 20 minutes, can prevent and treat gyrodactylosis, trichodinosis, etc. (5) Use a mixed solution of 8 mg/L copper sulfate and 10 mg/L bleaching powder to soak the fish fry and fingerlings for 20 minutes, can prevent and treat bacterial gill rot, red skin disease, enteritis, etc. (6) Use a mixed solution of 5 mg/L bleaching powder and 3 mg/L caustic soda to soak for 20 minutes, can prevent and treat gyrodactylosis, dactylogyrosis, etc. (7) Use 0.2 mg/L yuchongling solution to soak the fish fry and fingerlings for 15-20 minutes, can prevent and treat fish lice, anchor worms, cyclops, water centipedes, pine algae bugs and other diseases.

3. Precautions (1) After the drug is diluted according to the standard, pour it into the bag; do not sprinkle it in directly. Prepare and use it immediately; do not dissolve the drug in a metal container. (2) The disinfection time refers to the time at a water temperature of about 20°C.

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