There are no leaves in water culture. If the water is not changed in time, the water quality shall be changed according to the seasonal change to keep the water clean. If it is caused by long-term lack of light, it needs to be exposed to soft light during the growth period, but it cannot be exposed to the sun in summer. If there is no drop of nutrient solution, in addition to regular water change to provide nutrients, it is also necessary to drop the nutrient solution in combination with this period of time.
