一.防水浅。当冬季鱼池水体表层封冻后,池中的水温较低,加上气温和阳光的影响,池水通常会出现垂直分层的现象。一般在水下1米处的水温约2～3℃,自1米向下,水温会逐渐升高。所以,鱼类在冬季往往都聚积在鱼池的深水处。针对这种情况,冬季鱼池的不冻水层,应保持水深1.5～2米,不能过浅。 A shallow waterproof. When the winter fish pond water surface frozen, the water temperature in the pool is low, coupled with the impact of temperature and sunlight, the water is usually the phenomenon of vertical stratification. Generally 1 meter below the water temperature of about 2 ~ 3 ℃, down from 1 meter, the water temperature will gradually rise. Therefore, fish tend to accumulate in the deep water of fish ponds in winter. In view of this situation, the winter fish ponds unfrozen water layer should be kept at a depth of 1.5 to 2 meters, not too shallow.