EC or electrical conductivity is one of the main things to consider when growing marijuana. This parameter expresses the concentration of mineral salts of the nutrient solution and is closely linked to the nutrition of our plants. Complementary to pH (potential of hydrogen), EC is an essential value that allows us to measure the concentration of the nutrients necessary for our plants' development at every stage of growing, directly affecting health and vigour.

• More info: How to adjust the EC in cannabis growing