Cleaning of parent fish culture pond

1. Drain the pond, remove excess silt, level the pond bottom, repair the pond bottom wall and inlet and outlet, remove the pond bottom and tall plants. After a few days of exposure, the pond is filled with fresh water.

2. Commonly used methods are (1) quicklime clear pond a method is dry quicklime clear pond that first drain the pool water, leaving only 6~10 cm of pool water at the bottom of the pond, dig a number of small pits around the bottom of the pond, put quicklime into the small pit and add water to melt, before cooling, splash evenly into the pond, the second day must be used iron rake to move the pond mud, so that lime slurry and sludge are fully mixed. The amount of quicklime is generally 50~75 kg per 667 square meters. Another method is to clean the pond with water, that is, the pool water is not discharged, and the melted lime slurry is poured all over the pool. The amount of quicklime is 125~150 kg per 667 square meters of water depth. (2) bleaching powder the chlorine content of bleaching powder generally used for pond cleaning is about 30%. Dry pond cleaning dosage is 5~10 kg per 667 square meters, pond cleaning dosage with water is 1 meter deep, 13.5 kg per 667 square meters pond. The method of use is to dissolve bleaching powder in water and immediately sprinkle it evenly throughout the pool.

3. Tea dregs are cleaned by beating tea dregs into small pieces, soaking in water, and soaking in water temperature of about 25 DEG C for one day and night. The dosage is 40~50 kg per 667 square meters at a depth of 1 meter.

4. Ammonia water clearing pond depth 10 cm, every 667 square meters of pond with 50 kg of ammonia. Add several times dry pond mud when using, stir evenly and sprinkle evenly in the whole pool. When the above drugs are used to clear the pond, it usually takes 7 to 10 days for the drug to disappear before the parent fish can be raised.