AquaWiz KH Controller Gen 5Maintaining KH level (alkalinity) in a tank can be challenging. The conventional method of alkalinity measurement is to mix an acid such as HCL with a sample solution of tank water. And record the change of PH values before and after the mixing. The alkalinity of the water sample is then obtained as a function of PH value changed, and the amount of acid added. Its a complex and time consuming process that you may have to perform over and over. Say