BAC - PH DOWN - 5LPH Down PH strongly concentrated to lower the pH. With this nitric acid you will be able to adapt the nutrient solution to the PH of your substrate solution. This product must be handled with care because it can cause severe burns on contact, as it is nitric acid which provides an extra dose of nitrogen to the solution. When using organic stimulators, it is necessary to correct the PH as the acids eliminate the very important characteristics of the