Green Planet Dual Fuel 1 - 1 GAL / 4 L - Case of 4Green Planet Nutrients Dual Fuel is a two part base nutrient that is easy and simple to use. Whether youre a novice or master grower, Dual Fuel can be tailored to the demands of your grow. This is the base for the Dual Fuel Feed Program. Dual Fuels two part formula provides the nitrogen (N), phosphorus (P), potassium (K), and a combination of secondary micronutrients that plants need at various stages of growth. Both bottles are used in a 1: 1 ratio