Green Air 93111 Hydroponic Garden Microbase Nutrient Solution, 32-Ounce Formulated to provide all the trace elements required for essential internal plant functions without detrimental mineral build up from repeated usage High quality chelated micro-nutrients, supply superior ion exchange, aiding in plant absorption and preventing elemental lock up The micro-base formula also includes nitrogen, phosphorus, potassium, and magnesium which are used in proportionally large quantities by the plant The micro-base, is the foundation of our complete nutrient system, and should be used in combination with the Genesis grow or bloom supplements The foundation of the hydroponics nutrient solution; measures 3.2 inches in length by 3.2 inches in width by 9 inches in height