In The News The following are a collection of news articles that were published in various newspapers and magazines about Sigma and the high quality products that we manufacture. Di-Polar Water Conditioning: Today's Technology Green Home 21 Pool Chemical-Free Sanitation Pool Managers Keeping Water Clean With Less Chlorine Magnetism Could Put Sparkle In Your Splash Rose Tree Woods Swim Club Is Doing Away With Chlorine No More Chlorine It's All Done With Magnets Eye On Ions Chlorine Family Unsafe U.S. Clean Water Plan To Ban Chlorine?