How to Change Hydroponic Garden Water

Hydroponic gardens grow plants without soil by feeding the roots with solutions of nutrients dissolved in water. One of the advantages of this system is complete control of the nutrient content, which can lead to higher crop yields. Most small-scale systems are water or aggregate culture systems that use a single container of nutrient solution. The solution enriches the plant roots through one of several methods and then drains back into the original container. Over time, the individual nutrient concentration within the solution changes as the plants take what they need. To return the solution to the desired nutrient content, you must completely change the hydroponic nutrient solution periodically.


Remove the plant growing tray or bed from the hydroponic system.


Empty the used nutrient solution into a waste container.


Scrub the inside of the empty container with a brush to remove any residual nutrient deposits.


Wash the container with water to remove residual nutrient deposits dislodged by scrubbing, and discard into the waste container.


Refill the hydroponic solution container with stock nutrient solution.


Place the plant growing tray or bed back into the hydroponic system.