New Mobile App The Growth Technology nutrient mobile calculator is here! Each nutrient calculator has been designed specifically for IONIC and for the Growth Technology Twin Packs. The calculator is a useful and reliable resource as it is programmed with genuine data about each nutrient solution so the results are accurate and highly specific. Work out the solutions on the go with this new mobile application. Be more accurate than ever before and grow with efficiency! Follow the link below for more details on how to purchase the app from your mobile. To make up a fresh tank of nutrient solution – enter the required information in the calculator: • Tank volume • Background EC • Target EC Touch CALCULATE and it will advise the exact amount of nutrient concentrate needed to achieve the desired EC.