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For the last twenty years, EC measurements have been widely used outside the scientific field. Today, they concern not only laboratories or teaching but also very varied sectors such as water treatment, environment, agri-food, cosmetics, pharmacy or aquaculture and hydroponics. To succeed in hydroponics, two testers are essential to the conduct of a good culture The pH (hydrogen potential) The EC (electroconductivity of water) Growshops offers PH and EC testers, reference for the measurement of the PH and EC. These testers are used in the most important laboratories in the world.