The injected water must be fresh, non-polluting, rich in dissolved oxygen, and the temperature difference should not be too large. Generally, the temperature difference between the fry pool does not exceed 2°C, and the species fish pond does not exceed 5°C. The upper water source of the source should be drawn when pumping. Generally, the water suction pipe is inserted into the water surface about 30 centimeters. This kind of shallow water has low organic matter content, high dissolved oxygen content, and similar water temperature to the pool temperature. It is beneficial to the growth and development of fish after it is injected into the pond. Before adding water, the original pool water in the bottom part of the pond should be drained, then the new water should be injected, and the water inlet should be filtered with a dense mesh to prevent the wild fish and enemy pests from entering the fish pond. When the water is added, the new water is flushed along the upper horizontal line of the pool water, so that the upper layer of water can be stirred to increase oxygen. Squid Frozen,Frozen Squid Illex,Fresh Squid,Frozen Pacific Squid Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com