http-//www.merusonline.com Rings are charged with particular oscillation patterns, each of which target and solve specific problems. The Merus Ring is made out of two halves of a treated alloy. The two halves can easily be installed on the outside of a pipe as a collar. Once the Merus Ring is installed, it automatically starts to emit different kind of oscillations. As can be seen in the movie, for each problem there is a dedicated oscillation to fight a specific problem. The red oscillation fights rust and corrosion, the black one fights calcium carbonate and other salts, the green one is fighting microbiological problems such as bacteria, algae or bio-fouling. View our video for more details.