Ultra concentrated formulas provide 100% complete nutrition for optimum results. The Aptus Approach is to provide quality uniform products and education that enhance growers' production and cultivation. The Aptus Approach is based on a preventative methodology for plant, pest and environmental problems. For many years 1tsp (5 ml) per gallon was an industry standard concentration. Growers simply accepted these ratios because there was not other choice. Aptus nutrition products are all based fully on active ingredients, such as L-amino acids rather than water. Everything in an Aptus bottle is used readily by your plants. When combined with your favorite base NPK, the seven products in the Premium Aptus Collection contain precisely the amounts and forms of every nutrient that your plants need.