Avoiding heavy losses during the pond winter is the key

Avoiding heavy losses during the pond winter is the key

Winter is the critical period for clearing fish ponds. Because, after one year's breeding, all things accumulated in the pool bottom, the mud thickened, and the pollution increased. (Each after a food chain link in aquaculture will produce a large amount of unused material, as well as the use of fish and medicine to cause self-pollution of the fishery environment.) 1. Long-term cultivation without pond cleaning will deteriorate the water quality. Excessive levels of lethal toxic substances such as nitrites and hydrogen sulfide seriously affect the healthy breeding and growth of fish, shrimp and crabs. Practice has proved that the water quality in most ponds is caused by the deterioration of sediment quality. 2. The bottom of the pond contains a large number of pathogens such as parasites, bacteria, and viruses. When water quality deteriorates, acidic substances increase and pathogens breed, which can easily cause fish disease. 3. The bottom of the pond carries a large amount of organic material such as bait, feces and dead algae. Corruption and decomposition of these organic substances will consume a large amount of dissolved oxygen in the water, so that the dissolved oxygen in the water is often below 2 to 3 mg/l. Practice has proved that such low dissolved oxygen can cause anoxic floating of fish, shrimp and crab. ,even death. 4. The pool slope collapsed and the sludge thickened. Shallow ponds, reduced water carrying capacity, reduced space for fish movements, and reduced yields. In short, ignoring pond clearing will cause great harm to the growth of fish, shrimp, and crab. We must learn lessons from it, otherwise we will suffer heavy losses.

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