Need! Tell you a better way. The clams should be put into the basin, and the amount of water released should be subject to (Mo Si Sheng), and a basin with the same caliber should be buckled at the top of the basin. Push up and down hard, so you can spit out a lot of sand and pour out the water. Repeat this three times to make sure there is no sand at all. The advantage of this method is that it saves time than salt and is definitely clean.