GH FloraMicro Hardwater - 1 Qt.In Store Location: @D11 warehouse location:@A4 If you have hard water, you can easily adapt Flora Series by using FloraMicro Hardwater instead of our standard formula. FloraMicro Hardwater is part of Flora Series, the original three part hydroponic based nutrient system from General Hydroponics. By using different combinations of FloraMicro Hardwater, FloraGro, and FloraBloom, you can fulfill each plants nutrient needs for every growth stage and