Second, look at the size of fish growth: From April to May, the food intake of fish began to increase gradually. In the feeding plan for one week or one ten days, the changes at the beginning of week and weekend or the beginning and end of ten days should be observed. If the amount of feeding is not changed, and it is finished at the end of the weekend or the end of the second day, it means that the weight of the fish has increased, the amount of food has been increased, and there is no enough food, and the amount of feed should be increased appropriately.
Three to watch the water movement: after eating the fish are generally sink to the bottom. After feeding, if the fish is not sick and frequently moves on the water surface, it is a manifestation of hunger. In particular, fry or fingerlings swim in groups on the water. This is a manifestation of severe hunger. It is commonly called “race horse disease†and should be eaten immediately. Block mad tours, otherwise it will kill in large numbers.
Fourth, to see the changes in water quality: For oysters, oysters, etc., mainly for food and plankton-based fish, can observe the water quality of fat to determine whether to meet its growth requirements. When the water quality is thin, use fertilization method to cultivate plankton; when the water quality is too fat and there is deterioration of the floating head, it is necessary to immediately change the water and turn on oxygen, and if necessary, put trichlorfon to kill the zooplankton and promote the growth of the fish.
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