Blue Planet Nutrients Elite MICRO Gallon (128 oz) One of 3 parts of Blue Planet Nutrient's Elite Series base nutrients for complete plant nutrition High grade, ultra-concentrated formula Designed for use in all hydroponic systems, aeroponics, coco-coir, all soil-less mediums such as vermiculite, perlite, and in soil Proven results across the internet! See why everyone is raving about Blue Planet Nutrients!