Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, mineral wool, or coconut husk
Stainless steel probes deliver fast and accurate readings with ten times better resolution. Comes with protective case and calibration solution.
Measures in part per million (PPM)