Internet of things is literally on everyone's lips, and describes, such as the Internet in equipment has arrived. In our industry, you might think, IOT aviod the pools. We should change that together! Maybe it just needs a new slogan for it, as industry 2.0 or GroKo (german for big Coalition), in which the name is more powerful than the content. The chemical basis for disinfection have not changed significantly, we will address these fundamentals. How can a own Internet of water build up in each pool , but will play a major role in the following.