Humic Acid is a material that is found naturally in fertile soil and it can do wonders when added to a nutrient solution. Humic acid molecules are larger than fulvic acid molecules and make great soil conditioners. Fulvic acids are smaller, more biologically active molecules that are faster-acting and make excellent foliar sprays. Both improve the uptake of minerals, stimulate plant growth, and improve the plant’s natural resistance to environmental stresses. When humic acid breaks down the nutrients in your nutrient solution into elements that are much more available to your plant, it can help photosynthesis. With photosynthesis improved, your plants have the ability to create more carbohydrates. And with a larger store or carbohydrates, your plant will have all of the energy reserves that it needs to grow quickly, which means a faster harvest and a bigger yield.