Citric Acid - 20 lbs.Our product is approved for organic growing and meets NOP standards for natural fermentation. It is certified as non GMO origin. Citric acid can be used to: Neutralize or acidify water. Lower the pH of soil less media. Improve micro nutrient uptake from the soil. Increase the efficacy of herbicides and insecticides. Our food grade citric acid can be used in many processes, including cheese making, brewing beer, and making wine or soda.