Bluelab® Conductivity Pen (EC or PPM) Base Nutrients Harvest Keeper® All Clear Sealer

Harvest Keeper® All Clear Sealer Bags are BPA-free and produced from FDA-approved food-safe materials

In its natural state

Drain completely and refill reservoir with fresh nutrient solution

Water Soluble Nitrogen 0

Bluelab® Conductivity Pen (EC or PPM) Base Nutrients Harvest Keeper® All Clear SealerBluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow Measuring conductivity and temperature, the Bluelab Conductivity Pen keeps track of two fundamental aspects that determine your plants' ability to thrive. With the Bluelab Conductivity Pen (EC or ppm) you'll never have to guess your nutrient concentration again. This is