Base fertilizers must contain the three major macro nutrients: nitrogen, phosphorus, and potassium. The difference in hydroponic/regular fertilizers is that they contain a perfect balance of all the essential macro and micro-nutrients which fertilizers intended for use with soil do not have. Hydroponic and Regular fertilizers tend to be extremely refined and balanced so the plant can easily consume them. Organic fertilizers are different. They rely on beneficial microbes and bacteria to break down nutrient molecules for easy plant consumption. Hydroponic and regular soil fertilizers provide nutrients in a simple to uptake form. Due to the incredible growth in the Hydroponic Fertilizer market many of the new organic fertilizers are refined enough to rival inorganic nutrients.