General Hydroponics FloraMicro (5 – 0 – 1) provides rapidly growing plants with Nitrogen, Potassium, and Calcium as well as a unique combination of chelated micronutrients and trace elements plus special pH buffers. Ideal for all hydroponic applications. Use a conductivity or ppm meter to monitor water quality and control nutrient strength. Drain, discard and replace nutrient every week to prevent nutrient imbalance. Always add To fresh water first and stir well, then add FloraGro and or FloraBloom. Never combine FloraMicro with FloraGro or FloraBloom in undiluted form; doing so may cause nutrient lockout making some minerals unavailable.