Catching shrimps in the water: When the water depth is one and a half meters, apply 50 grams (2 ml) of medicine per mu (667 square meters) of water surface, mix with sand and sprinkle it into the water. After the medicine takes effect, the shrimps They will swim to the shore and let people catch them without running away. After they are fished out, they will be put into clear water and kept for sale. The dosage increases when the water is deep, and decreases when the water is deep. 2. For shrimp fishing in rivers and rivers: Mix this product with sand and then sprinkle it into the water in the upper reaches of the river. Fishermen can pick up shrimps on both sides of the river. Shrimp nets can be used to block the path of shrimp fishing. The dosage of the medicine is 10-50 grams. It can be tried from small to large amounts according to the depth of the water, the width of the water surface, the flow rate of the water, etc. When the shrimps on the shore wake up and have the ability to move, it is proved that the medicine should be sprayed first. If the medicine is no longer effective enough, you should sprinkle it with a good medicine.