Causes of and Countermeasures for Fish Pond Turnover in Rural Fish Farming

In rural fish farming, “pond turnover” means that half a year's hard work has gone down the drain, and many people fish out the dead fish while crying. So why does pond turnover occur in rural fish farming? What are the countermeasures?

1. Causes of pond turnover in rural fish farming

1. Pond turnover caused by abnormal weather

(1) Rainstorm weather: strong sunlight during the day, but sudden thunderstorms around dusk, or continuous rainy days with overcast skies and no sunlight;

(2) Muggy weather: prolonged thunder without rain, little wind, consecutive muggy days with low air pressure, and weather that turns overcast after a long clear period; third, strong wind weather: clear skies and high temperatures during the day with southerly winds, turning to northerly winds at night with a rapid temperature drop, which is more commonly seen in autumn.

2. Pond turnover caused by management mistakes

This mainly occurs at the adult fish stage, when there is a sudden power outage that goes unnoticed, and the aeration equipment is not found to be running under oxygen-deficient conditions; similar cases of pond turnover also often occur in aquaculture production.

2. Countermeasures for pond turnover in rural fish farming

1. Carry out water quality treatment in advance when weather is abnormal

Under abnormal weather conditions, adjust water quality in advance to increase the dissolved oxygen and anti-stress capacity of the water body, for example by using Tongwei Golden Peptide, water-improving and detoxifying treasure, oxygen enhancers, sodium humate and other water-improving products, and if conditions permit, add some new water in advance.

2. Pay attention to pond management before and after pond turnover

(1) When weather is abnormal, control the amount of feed fed to avoid increasing the oxygen consumption of the water body;

(2) During abnormal weather or rainstorms, check whether the aerators, power supply, and lines are working normally to avoid sudden accidents;

(3) Stock disinfection and oxygen-enhancing products in advance to prevent accidents; especially oxygen-enhancing products, which can be used once every 5-8 hours in severe oxygen deficiency;

(4) When pond turnover and fish deaths occur, promptly remove dead fish and diseased fish and carry out harmless treatment to avoid the breeding of pathogens;

(5) Adopt reasonable disinfection measures; after pond turnover occurs, choose low-irritation disinfection products for disinfection;

(6) If conditions permit, discharge bottom water during rainstorms, and at the same time take good anti-escape measures;

(7) Pay attention to maintaining reasonable use of aerators; microporous aeration can be run 24 hours a day;

3. Strengthen routine preventive management

(1) Do a good job of pond clearing to avoid a large amount of organic matter accumulating at the bottom of the pond;

(2) Strengthen routine water quality management: regularly manage the pond bottom and water quality, and regularly use Bacillus, photosynthetic bacteria, and water-culturing products such as Feed Partner 1, 2, 4, as well as Golden Peptide and lactic acid bacteria, to maintain a reasonable algal and bacterial phase in the water body;

(3) If conditions permit, regularly discharge bottom water, or build a bottom sewage discharge system, discharging 2-3 times a week to reduce organic matter, residual bait, and fish excrement in the bottom water body of the pond and improve the water body's self-purification capacity;

(4) Strengthen pond aeration management: reasonably equip aeration equipment; for a pond with 2000 jin per mu, equip a 3 kW aerator for every 3-5 mu; at the same time strengthen aeration in the feeding area; for a 10-20 mu pond, equip 2.2 kW microporous aeration, install 60 aeration discs in the feeding area, and during the peak farming period strictly follow the “12+5” usage pattern: run for 12 hours at night, run for 5 hours during daytime feeding, and use all day when oxygen is deficient.