I wish to establish a water treating system. With what should I begin?
See above - from the full chemical analysis of water. Then, on the basis of the analysis and in view of parameters of a premise experts will pick up and will recommend the system necessary to you. However, it is not enough only analysis of water for selection of system. You need to answer a number of the important questions on a premise - about number of cranes, baths and toilet bowls in your house, about quantity living in it, about presence of pool, etc. All these data allow you to choose optimum parameters of system productivity.