In winter and spring aquaculture, cleaning pond disinfection is very important!

Why do ponds need to be disinfected?

Aquaculture ponds are easy to deposit at the bottom of aquaculture ponds due to many reasons, such as feeding, fertilization, animal excretion and so on. in order to ensure the safety and hygiene of farmed animals, it is necessary to carry out regular disinfection work such as drainage, desilting, freezing, sun exposure, pesticide application and so on.

In recent years, labor costs have increased greatly. In order to save time, effort and reduce costs, farmers often simply adopt high-dose drug disinfection, resulting in many serious consequences, such as drug residues in ponds, illness and even death of aquatic products. Even due to the random discharge of undetoxified sewage, resulting in drug damage accidents in aquaculture water sources.

In order to reduce the economic loss and environmental pollution caused by improper drug selection and use, the correct disinfection methods of culture ponds in winter and spring are introduced as follows:

The purpose of pond disinfection

(1) kill the wild animals in the pond. Such as fish, shrimp, crabs, clams, snails, frog eggs, tadpoles, leeches, etc., to avoid competing with breeding for food, oxygen, space and spreading diseases in the coming year.

(2) eliminate pathogenic microorganisms. Such as bacteria, fungi, viruses, parasite eggs, etc., reduce the incidence of diseases in farmed animals.

(3) kill aquatic plants. Such as moss, algae, etc., especially filamentous algae such as moss, will consume a lot of nutrients in the pond water, making the pond water extremely thin, zooplankton can not reproduce in large numbers, and can entangle fish fry and shrimp and crabs.

Disinfection product recommendation

(1) quicklime. It is one of the drugs with the best disinfection effect in clearing ponds, which can kill wildlife, pathogenic microorganisms and aquatic plants, improve water quality, improve the soil quality of ponds, and directly play the role of fertilization. Choose quicklime for cleaning ponds, preferably the block ash that has just been transported back from the lime kiln and does not contain impurities before disinfection, and used immediately.

(2) bleach. After meeting water, the bleaching powder decomposes and releases hypochloric acid and alkaline calcium chloride, and hypochlorite immediately releases new ecological chlorine, which has the effect of strong sterilization and killing enemy organisms. Bleach for cleaning ponds is required to contain 28%-30% available chlorine.

(3) microbial preparation. It is recommended that you use 603 king of bacteriostatic and water purification-potassium persulfate compound salt.

It is mainly potassium persulfate trisalt complex, the fifth generation oxidizer, its oxidation ability is higher than that of most oxidants such as chlorine dioxide, sodium hypochlorite, hypochlorite, strong chlorine, potassium permanganate and so on, and it is safe, efficient and environmentally friendly; it integrates the functions of bacteriostasis, detoxification, oxygen enhancement, bottom modification, potassium supplement and balance algae to reduce the incidence of aquaculture organisms. Matters needing attention

1. Disinfection should be carried out in sunny days. The low temperature on cloudy and rainy days affects the efficacy of medicine, and it is generally disinfected when the water temperature is about 10 ℃. When the water temperature is 3 to 5 ℃, the dosage should be increased by 30% to 40%, and for ponds with thicker silt, the dosage should be increased by about 10%. You can consult the technical staff of our company for details.

2. Pay attention to safety when operating. Bleach is highly corrosive, do not stain the skin and clothing. When sprinkling, be in the limelight and sprinkle with the downwind.

3. Detoxification is needed after disinfection. ① if drug selection and improper use during the last culture cycle lead to the deposition of drug toxins, especially the formation of drug residues in the sediment. ② accumulates and contains a certain amount of heavy metal ions in the soil of the old pond and bottom. The above several cases, need to be detoxified after treatment, and to reach a certain period of time (generally more than 1 month) before stocking seedlings.

4. Don't discharge the water in the disinfection pool randomly. If the disinfection pool water has not been detoxified, or the detoxification is not fully discharged to other rivers, the drug concentration in the water area will seriously exceed the standard and pollute the water source environment. If the accident of drug damage caused by aquaculture water source is caused, the fishery administrative director and the environmental protection department should investigate its responsibility, even criminal responsibility.

5. Put an end to prohibited drugs. When some farmers clear the pond for disinfection, they often use illegal drugs intentionally or unintentionally (some market drugs contain prohibited drug ingredients), which leads to hidden dangers to the safety of aquatic products in the future. Therefore, Qingtang disinfectants must comply with the guidelines of the Ministry of Agriculture's announcement of the list of prohibited Veterinary drugs and other compounds in Food and Animals and the guidelines for the use of pollution-free Food and Fisheries drugs (NY5071).