FLORAMICRO HARDWATER: If your tap water is over 200 ppm (or contains Calcium above 70 ppm), use Flora Micro Hard water. If your water contains 30 to 50 ppm Calcium, you can mix our original Flora Micro with Flora Micro Hard water to create a perfect Micro blend for your plants. The original Building-Block Nutrient System, often imitated but never duplicated. Flora Series contains complete Primary, Secondary and Micro Nutrients for enhanced yields and better crop quality. Users can adjust mixtures to suit specific plant needs. Flora Series enhances flavor, nutrition, aroma, potency and essential oils in both hydroponic and soil cultivated plants. Flora Series contains highly purified concentrates for maximum solubility and pH balanced for ease of use. Known throughout the world as the industry standard, NASA and Antarctic Research Scientists choose Flora Series because of its superior formulation and reliability. DIRECTIONS FOR USE: Mix 2.5 ml to 10 ml per gallon of water depending on the plant’s growth stage. Note: The proper ratio of each Flora Series nutrient depends on the crop and the stage of growth (look on the label for specific recommendations).