General Hydroponics FloraMicro 2.5 GallonGeneral Hydroponics FloraMicro 2. 5 Gallon FloraMicro is part of FloraSeries, the O. G. 3 Part Hydroponic Based Nutrient System. More than 40 years ago, when the other guys were still in grade school, our scientists were hard at work with a mission: to give growers a consistent and precise way to feed their plants through every growth phase. First formulated in 1976, FloraSeries is the original 3 part hydroponic based nutrient system consisting of