Clearwater Enviro Technologies offers UL-listed ScaleBlaster” to eliminate formation of limescale deposits and struvite in water and wastewater pipes, faucets, cooling towers, boilers, heating elements and more without softening equipment, salts, chemicals or maintenance. The integrated circuitry system produces a unique and complex modulating frequency waveform that hits the resonant frequency of the calcium carbonate molecules causing them to lose their adhesive properties; existing scale is removed and never forms again. The product is non-invasive and adds nothing to the water. http://www.scaleblaster.com(800) 756-7946