The reason for the low survival rate of fry
1. The quality of the fry is poor. We must pay attention to ostriches to eliminate renewal and purify and rejuvenate work. 2. The fry pool is too large and too deep. The fry cultivation pool is suitable for an area of ​​2 to 4 mu and a water depth of 1 to 1.5 meters. 3. Fish ponds are more predators. Before fry stocking, it is necessary to completely clear the pond to kill the enemy's harmful organisms. When water is fed, the inlet should be tightly filtered with a dense net to prevent entry into the enemy. 4. The fish pond has less natural food. Generally can be in the fish pond before 5 to 7 days, organic fertilizer applied per acre 300 to 400 kg. 5. Drug residual toxicity has not been eliminated. When clear ponds should be selected weaker drugs such as lime, etc., and 1 day before fry stocking, take a few fish fry in fish ponds to observe for 1 day, such as fry activities are normal, you can put fry. Centrifuge Tubes,Plastic Centrifuge Tubes,Round Bottom Centrifuge Tubes,Conical Bottom Centrifuge Tubes Yancheng Rongtai Labware Co.,Ltd , https://www.shtestlab.com