The first step: clean up and remove impurities

Pond cleaning refers to the removal of various factors that hinder the growth of prawns.

 

For newly built cement slope protection ponds, because the cement is alkaline, it is easy to cause the pH value of the water body to rise, and it is necessary to soak in the water. The soaking water level is about 1 to 1.5m, the time is 7 to 10 days, and the pH value can reach 8.0 to 8.6. use.

 

The old ponds where the prawns have been farmed need to be thoroughly cleaned, the main purpose: one is to completely remove pathogen-bearing organisms and pathogenic bacteria; the second is to reduce the organic load on the bottom of the pond.

 

Sun: Drain the water first, and expose it to the bottom of the pool to dry (subject to the whitening of the sand and the easy removal of pollutants).

 

Removal: Manually remove the pollutants formed in the bottom of the pond, especially in the sewage area due to residual bait, feces, dead shrimp, dead algae, organic debris, etc.

 

Rinsing: If the flushing method is available during the rainy season, use a high-pressure water gun to remove the sludge at the bottom of the pool without leaving a smell (until the flushing water is not dark).

 

Turning: The turning method can be used in the non-rainy season. Till the bottom of the pond (20cm is suitable).

 

Sun: Sun exposure after cultivating (preferably let the bottom of the pond be cracked) to facilitate the oxidation of surface organic matter.

 

Repair: repair pollution, repair dams, and block loopholes.

 

Except: Be sure to remove crustaceans, barnacles, sea rabbits, snails, fish, shrimp, crabs and other creatures by the pool.

Newly built cement ponds can be quickly de-alkalied by spraying the walls of the tank with acetic acid due to the rush of production, and then soaked in water to shorten the soaking time. The normal breeding pond takes about 30 days. Through the above steps, the pathogens in the pond can be eliminated, the organic load of the shrimp pond is significantly reduced, and the environment of the aquaculture water body is improved. For black-film shrimp ponds, clear ponds are relatively simple. Generally, they are rinsed with a high-pressure water gun and exposed to water for one week to release seedlings.

 

Step 2: Disinfect the pond

After the inlet water is filled with the bottom of the tank, one of quick lime, bleaching powder, chlorine dioxide, etc. will be sterilized (if the pH value is too high, use bleaching powder for disinfection; if the pH value is low, use quick lime for disinfection). Tea bran can be used for removing impurities; after 1 to 2 days, drain the pool water.

 

The third step: degradation of residual poison

After 5 to 7 days of disinfection and decontamination, infuse water for 5 to 10 cm, and use organic acids and adsorbent degradation to degrade the residual poison or other harmful substances in the drugs used for disinfection and decontamination of Qingtang, so as not to affect the cultivation of algae and seedlings. Survival rate.

 

Step 4: Biodegradation and purification

After 3 to 5 hours of degrading residual poison, the whole pool is sprinkled with beneficial microbial agents to decompose biological corpses and organic pollutants, eliminate or reduce the hidden dangers of disease, remove the original source, establish the beneficial microbial population advantage, and convert biological corpses or other organic pollutants into nutrients Salt can eliminate or avoid the second pollution, and promote the cultivation of algae.