Mr. Kimani, Every little ...

Mr. Kimani,

Every little advice you get with the current question you posed will not suffice in my opinion. It could either be Marketers,  marketing a product or a hypothetical answer.  Having said that, however, there is need for you to at least provide some sort of information about the raw  water quality you're planning to treat for instance the turbidity, color, smell, taste if possible, P.h. and perhaps the bacteriological content. With such data it would be much easier for anyone interested in helping in my opinion to advice on the best treatment process that efficient and economically feasible.