Milwaukee Instruments Conductivity Solution, 12.880 mS/cm, 20 ml Sachets, case of 25 bloom You need to add nutrients

You need to add nutrients when you first water the substrate (use your nutrient supplier's recommendations)

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Expand & Plant Organic Coir Granules with Microbes & Nutrients 10 lbs fills 2 cu

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Milwaukee Instruments Conductivity Solution, 12.880 mS/cm, 20 ml Sachets, case of 25 bloom You need to add nutrientsM10030B calibration solution is formulated at 12. 880 mS cm, and is available in a box of 25@20 ml sachets. Calibration solution is essential for the correct operation of electrodes and for obtaining the most accurate and reproducible readings.