Common methods and characteristics of disinfection of fish ponds

After the fish ponds have been repaired, the following drugs can be selected for disinfection according to the local actual conditions, in order to kill wild miscellaneous fish, aquatic insects, benthos and various pathogens. the commonly used disinfection drugs are quicklime, bleach, tea wilt, Croton and so on. The disinfection effect of quicklime is the best.

Quicklime disinfection

Quicklime will produce strong alkali after contact with water, so it has a strong ability to sterilize and kill enemies. About half a month before seedling stocking, quicklime was selected for disinfection in sunny days. During disinfection, 7-10 cm of water should be left in the fish pond so that the quicklime scattered can be evenly distributed. The amount of quicklime is 60-75 kg per mu, and 50-60 kg is used in fish ponds with less silt.

[usage] first dig several small pools around the edge of the pool, then put quicklime into the pool to absorb water, sprinkle it around with a wooden spade without cooling, and be sure to sprinkle mortar evenly all over the ground. If the two sides of the fish pond are relatively narrow and can be sprinkled directly, the quicklime can be pulped in a wooden barrel and sprinkled directly on the ground. After a few hours, the mud and lime slurry at the bottom of the pond are reconciled with a long-handle mud rake, so that the pond mud and lime are evenly mixed to increase the effect of disinfection and disinfection. Fish ponds with inconvenient drainage should be disinfected with water. when the water depth of each mu of fish ponds is 1 meter, about 125-150 kilograms of quicklime will be used.

[characteristics] quicklime has a strong and thorough effect, which can not only kill aquatic organisms such as wild fish, frog eggs, tadpoles, crabs, leeches and poisonous moss in the pond, but also eliminate pathogenic bacteria and parasites of fish. At the same time, it can also improve the soil quality at the bottom of the pond, improve the soil fertility, increase the mineral elements in water, and play the role of direct fertilization.

Bleach disinfection

Bleaching powder generally contains about 30% chlorine, and hypochlorite and alkaline calcium chloride are released by wet decomposition. The new ecological oxygen released by hypochlorite has a strong bactericidal effect.

[usage] use 20 grams of bleach per cubic meter of water. After dissolving the bleach with water, sprinkle it all over the pool immediately. Bleach is easy to volatilize and decompose in the air and must be sealed and stored to isolate the air. Should be stored in a cool and dry place to avoid failure. It is best to use ceramic jars and wooden utensils for containers containing bleach, rather than metal utensils. You should wear a mask when using it and sprinkle it on the upwind.

[characteristics] the efficacy of bleach is similar to that of quicklime, but it decreases in fertilizer and water, and disappears quickly, so it is more suitable for ponds that are eager to use it.