The Allpoints 8012864 Biodegradable Descaler or commonly known as Rydlyme is a non hazardous biodegradable liquid that can dissolve scales and minerals in water based equipments. Since this descaler can dissolve upward of 2·2lbs of scale formation per gallon, it should be used in cooling towers, heat exchangers, and condensers, among other systems. Rydlyme is NSF/ANSI 60 certified and... https://partsfe.com/8012864-allpoints-biodegradable-descaler-1-gal-rydlyme