John Cohen
Early on January 10 - within an hour of unveiling the third of John Cohen's trio of articles on his quest to deliver toxin-free pool and spa water to his clients - I heard from a reader who wanted us to repeat all of the articles as one document to make it easier to share with clients who might be interested. "I want to let them know what a challenge it is
The three most recent editions of WaterShapes have carried trailblazing articles by John Cohen on his quest to define and develop a toxin-free approach to swimming pool and spa water. I offered no comment when the series started, basically because the articles had to stand straight and tall on their own - but also because
