Crab dumplings occur in old crab ponds that are not completely disinfected. Deterioration of water quality, particularly in low-pH waters, deduction of crabs, the following describes its control methods for reference. Symptoms: The diseased crab has legs bent, trembling, squatting, getting on the grass ashore, refusing to eat, sometimes spiting, and visually inspecting dead crabs without mucus and other conditions. After onset, they died on the shore, in the grass or in the cave within 3 days to 5 days. Prevention: Thorough clear ponds, old crab ponds or crab areas that have undergone crab disease must be strictly sterilized. After clearing of Tongkou, 10 cm to 30 cm of deep water is left in the pond, and 100 kg of calcined lime is used per acre to be converted into slurry. The water is evenly sprinkled in the pool water. After half a month, the water is cleared and the remaining poison is removed; the formaldehyde is disinfected with a concentration of 10 mg/L. Change water after 10 days. The pond was first drained to 0.7 meters and then sprinkled with 5.6 ml/l to 6.0 ml/l of formaldehyde. The water was sterilized for 5 days to see the initial effect. In 12 days, the effect was significant. Crabs did not occur within one year. 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. Co And Gas Alarm,Gas Detector And Co Combo,Combo Smoke Co Detector,Gas And Co Combine Detector Rictron Industrial Co., Ltd , https://www.szrictron.com
We continually strive to maintain our unwavering reputation through our exceptional product quality and customer service. We not only offer a complete line of superior quality products, but also work with our customers to develop new formulas and address the burgeoning market. So, we get so many goods response from our global customers. Welcome your exlusive customization of OEM and ODM, we will grow together and create brillant with you.