Last time, we went through a wide range of systems about pH/ORP, Conductivity, DO and Turbidity/SS and thus this time I shall begin with Residual Chlorine system, Fluoride system, Specific Gravity system and also enhance the knowledge about the topics as previously mentioned. But, I would appreciate that if you could give me some opinions about training you might need most. In that case, it would be beneficial for me to arrange the training content.