Protec's® powerful dual-action formula makes it very easy to maintain surfaces on fountains and other statuary surfaces free from scale and stain buildup. Protec contains an advanced triple blend of enviro-safe organo-phosphates and polymers for superior results. Protec both prevents and removes existing white calcium scale buildup on surfaces. This product will also control and remove metallic stains on surfaces due to copper, iron and other metals. And it will also help prevent pump damage due to hard water buildup and deposits. Protec also eliminates the need for distilled water for indoor fountains. One monthly application provides long lasting protection.