Give your plants the essential key nutrients needed for healthy growth. It is recommended to empty the reservoir and replace the nutrient solution on a weekly basis. As plants grow large they begin to use more and more Nitrogen. If the reservoir is not emptied and replaced with new water… adding an additional bag could cause salt content to build up. It is very important to replace both the water in your reservoir and the nutrient solution. Drained solution can be used to water house plants!
Purchase include one months supply or 4 bags of nutrient salts