Humboldt Nutrients HNM404 16-Ounce Humboldt Micronutrient System Used with grow and bloom to be a complete growing nutrient system for hydroponics Contains three separate chelating agents, triple insurance against nutrients falling out of solution or nutrient lock-out Humboldt nutrients micro has all the micronutrients necessary to create healthy plants, strong aromas and large yields Formulated an easy to use fertilizing program for a variety of vegetables, flowers and herbs This premium three-part nutrient system leaves nothing to chance and ensures an excellent crop