We came across the Vulcan anti-scale device after years of dealing with the disadvantages of calcification. After 2 weeks we saw first-hand that many of the products claims were impressively true. Lime scale deposits in our shower and sinks are now easy to remove. After 4 weeks when we inspected our aerator there was no scale accumulation; the past it was necessary to clean it every 4- 6 weeks. We are very satisfied with the Vulcan device and will certainly continue to use it and recommend it to your friends.