Hanna GroLine Direct Soil EC Tester/Pen Growth ensuring relative humidity is kept

ensuring relative humidity is kept at 69% in a contained area

fostering a robust growth environment

Diameter when full of water: 17"

then drop it back in

Simplify your nutrients by directly installing Dosatron Doser into the water supply line

Hanna GroLine Direct Soil EC Tester/Pen Growth ensuring relative humidity is keptHanna GroLine Direct Soil EC Tester Pen The HI98331 Direct Soil EC Tester Pen is a pocket tester that allows you to directly measure soil conductivity (EC) and temperature. The Direct Soil EC Tester Pen is a great option for taking direct conductivity measurements in soil because of its compact size, automatic calibration, and single button operation. The HI98331's steel penetration electrode means you no longer have to make soil slurries. The HI98331