First, pay attention to prevent drastic changes in water temperature Crab ponds should maintain a certain level of water to prevent drastic changes in water temperature; In addition, when adding new water should pay attention to the temperature difference does not exceed 3 °C, to prevent cold death of crabs. ?

Second, pay attention to the timely sale of mature crab before and after the annual frost, a group of second-instar crab gonadal maturity, manifested as the back shell was dark green, male crab chewing foot thick and long hair developed, chelipfoot, step foot healthy and powerful, female navel become Oval shape, surrounded by small black hair. At this time, the osmotic pressure in the crab increased, often due to the inability to adapt to the low osmotic pressure of the fresh water environment and died. Therefore, these river crabs should be promptly captured for sale on the market. ?

Third, pay attention to prevent crab indigestion Autumn water temperature and climate changes can easily affect the crab appetite, causing indigestion and lead to death, this time should take the following preventive measures: (1) improve water quality, regular use of lime water Quanchiposa; ( 2) Feed more animal feed containing high protein, add plant feed, and add antibacterial drugs and auxin regularly in food; (3) Strictly follow the “Four Ding” requirements when feeding, and the amount of feed varies with water temperature. Decline and gradually reduce.

Gas Detector

RICTRON Industrial Co., Ltd is a hight-tech OEM/ODM enterprise, we are specialized to produce the products such as fire smoke alarm, carbon monoxiede alarm, gas alarm, water alarm, smoke&co or gas&co combined alarms, and other products of R&D, manufactring and sales since 2008.

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