That depends on the size of your charge and the ratio to water. Generally speaking, water is about ten times the weight of the medicine bag, and the medicine bag can be used twice, and the water is poured out on the same day. Because the power of water is much reduced once, the power of medicine bag can be used once or twice, but the power of medicine for the third time will be much smaller than that for the first two times, so it is generally used twice.