Then add an appropriate amount of salt water, tap water needs to be sun-dried, salt can not be added too much, add a small amount of salt is just to disinfect the crabs, to prevent viruses, feeding water can not be too deep, the best depth of water is the water is just soaked over the shell of the crab, so that the crabs can touch the air to breathe.
You can let the crabs sunbathe properly, but not for too long. Crabs like to live in dark and humid places, but still have to be taken out often to sunbathe, remember not to be exposed to the sun for a long time, high temperature is easy to kill crabs.
Crab is omnivorous, red nematodes, egg yolk, chicken and duck offal, small fish, shrimp, raw fish, dried fish, shrimp, screws, mussels and so on can be or grass are its food. It is best to feed it with some grasses, such as bitter herbs and Erythrina, and pay attention to the right amount when feeding it. Prevent too much food from being deposited on the bottom to ferment and produce harmful microorganisms. The feeding intensity of crabs increases or decreases with the change of seasonal water temperature, and the feeding frequency should be adjusted appropriately with the change of water temperature in summer and fall. Crabs are stubborn when they just arrive at unfamiliar environments, so it's time to starve them for a few days before feeding them food.
Crab is a group living animal, it is best to keep several crabs together, so the survival rate is higher.
Time to change the water, cleaning small pots or glass tanks, every once in a while to help the crabs take a bath, to help the crabs to clean the best with a hand to fix the crabs, be careful not to be pinched, with a toothbrush gently scrubbing the whole body of the crabs, don't forget some of the corners of the dead, after brushing with water can be put into the pot of the feeder. Often help the crab cleaning, mainly to prevent infectious diseases, but not too violent with soap cleaning.