Bluelab Combo Meter Plus HGCOV4 It includes simple 1 button

It includes simple 1 button calibration for pH 7 and pH 4

  FoxFarm also include earthworm castings

increase root biomass

or use it as a stand-alone growing medium

Measures electrical conductivity (EC)

Bluelab Combo Meter Plus HGCOV4 It includes simple 1 buttonThe Bluelab Combo Meter Plus is an all in one, convenient portable solution for accurate measurement of pH, conductivity and temperature in nutrient solution. The battery powered, lightweight unit can be used anywhere, anytime to measure critical parameters related to nutrient uptake in plants. The Bluelab Leap pH probe also allows fast and accurate pH measurements direct from the root zone in a wide range of growing media including soil, rockwool,