Without any disinfection, people who don't understand are talking nonsense. The bottom of the bottom filter tank is covered with coral bones, and the filter cotton is placed in the frame of the launch site. After washing once a day, king crabs can be raised at salinity 1.028 and temperature of 2-5℃. In addition, the temperature of Bolong water is around 9℃, and it is best not to mix with king crab. If there is no refrigeration equipment to cool the fish tanks, they will all die when they enter the tanks.