Transplant emergency water plants first, the current season is more appropriate to have water peanuts, in addition to water water hyacinth, duckweed (captive), to solve the temporary needs. In short, summer is coming, shrimp ponds in no grass or less grass farmers must pay attention to the summer water grass coverage to reach about 60 to 70%, crayfish can be safe over the summer. For the direct sun is more powerful place, it is best to add shade net, to prevent the water temperature is too high, and the resulting iron shrimp appear.

Your situation is because of the lack of water plants in the water, coupled with high temperatures, resulting in very low dissolved oxygen in the water, the increase in organic matter in the water, anaerobic decomposition of ammonia nitrogen and nitrites and other hazardous substances, crayfish body weakened, if the crayfish moult, because of high temperature hypoxia respiratory distress and death. So crayfish in order to avoid the danger, it will stop molting.

Shrimp farming must first plant grass, now planting submerged water plants may be more difficult, so I recommend first transplanted floating plants, such as water hyacinth or water peanuts, planting area of about 40%, with bamboo poles into a piece of uniform distribution, to prevent the spread of large areas. Can effectively reduce the daytime light, play a role in reducing the water temperature, and can purify the water to reduce the content of ammonia and nitrogen in the water.

As the saying goes, shrimp do not raise grass, equal to blind nonsense, shrimp must have grass, after the construction of the pond disinfection you should be planted on the watercress, watercress varieties! Bitter grass, Ella algae, water peanuts, millet grass, etc. ... The more varieties of water plants the better, water plants accounted for about sixty percent of the area of water plants, water plants can help crayfish shelling, shelling after the crayfish's body side of the very soft, they can hide in the water plants to prevent each other from killing each other, the water plants can also give the crayfish shade, water plants shrimp substrate are very clean, not enough feed feeding! When they can eat some of the secondary cause of water plants, it should be breeding ponds are not enough water plants, can not meet the crayfish to provide shelling required to hide in the environment. However, crayfish do not shell, not only these two reasons, there are such as water temperature, breeding density impact.