What are the prevention and control methods for crab molting disorder?

Symptoms of crab molting disorder

When crabs have diseases or lack certain trace elements, they develop molting disorder; the crabs are unable to molt or can only molt out part of the shell, cracks appear on the head, thorax and abdomen, the whole body turns black, and eventually they die.

Prevention and control methods for crab molting disorder

Check whether the crabs are diseased; if they are already diseased, treat them with the appropriate medicine; or crush crab shells (poultry eggshells also work) and mix them into the feed for feeding; or splash limewater over the whole pond (lime at a concentration of 15-20 mg/kg in the pond water), once every 5 days, for 3-4 consecutive times.